Solve for z.
In 63 = In z + In 7

Answers

Answer 1

ln z + ln 7 = ln 63

When adding two logarithms of the same base, you can combine them into a single logarithm where the input is the product of both previous inputs

ln 7z = ln 63

Take the exponential of e to both sides

7z = 63

Divide both sides by 7

z = 9

Let me know if you need any clarifications, thanks!


Related Questions

Question 4
What is the distance between the points (-6, 7) and
(-1, 1)? Round to the nearest whole unit.
about 13 units
about 7 units
about 61 units
about 8 units

Answers

Answer:

[tex]\displaystyle about\:8\:units[/tex]

Step-by-step explanation:

Use the Distance Formula:

[tex]\displaystyle \sqrt{[-x_1 + x_2]^2 + [-y_1 + y_2]^2} = D \\ \\ \sqrt{[6 - 1]^2 + [-7 + 1]^2} = \sqrt{5^2 + [-6]^2} = \sqrt{25 + 36} = \sqrt{61} ≈ 7,810249676 ≈ 8[/tex]

Since we are talking about distance, we ONLY want the NON-NEGATIVE root.

I am joyous to assist you anytime.

the angle turns through 1/5 of the circle what is the measure of the angle​

Answers

Answe 72

Step-by-step explanation:

360 divided by 5 is 72

A circle is a curve sketched out by a point moving in a plane. The measure of the angle is 72°.

What is a circle?

A circle is a curve sketched out by a point moving in a plane so that its distance from a given point is constant; alternatively, it is the shape formed by all points in a plane that are at a set distance from a given point, the centre.

Let the angle that turns through 1/5 of the circle be x.

We know that the measure of the centre of a circle is 360°, while it is given that the angle turns through 1/5 of the circle. Therefore, the angle will turn 1/5 of 360°.

[tex]x = \dfrac15 \times 360^o = 72^o[/tex]

Thus, the measure of the angle is 72°.

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At the beginning of the period, the Cutting Department budgeted direct labor of $46,300 and supervisor salaries of $37,200 for 4,630 hours of production. The department actually completed 5,000 hours of production.

Answers

Answer:

$87200

Step-by-step explanation:

Here is the complete question:

At the beginning of the period, the Cutting Department budgeted direct labor of $46,300 and supervisor salaries of $37,200 for 4,630 hours of production. The department actually completed 5,000 hours of production.

Determine the budget of the department assuming that it uses flexible budgeting?

Given: Budget for direct labour= $46300

           Supervisor salaries= $37200

           Expected production hours= 4630 hours

           Completed production hours= 5000 hours

Now, we know that company budget include both fixed and variable cost.

∴ Direct labour cost is a variable cost and Supervisor salaries are fixed cost.

Using flexible budgeting for determining the budget of department, we will pro rate the direct labour cost on the basis of production hours.

Direct labour= [tex]Budget\times \frac{completed\ production\ hours}{expected\ production\ hours}[/tex]

Direct labour= [tex]46300\times \frac{5000}{4630}[/tex]

Direct labour= $50000

we know the department budget = Fixed cost+variable cost

Department budget= [tex]\$ 37200+\$ 50000 = \$ 87200[/tex]

The department budget is $87200.

can anybody please help me??

Answers

Answer:

  (x, y) = (6, 1) is the solution

Step-by-step explanation:

Each of the equations is written in "slope-intercept" form:

  y = mx + b . . . . . . . . where m is the slope and b is the y-intercept

First equation

  The y-intercept is +7 and the slope is -1. That means the line goes down 1 unit for each unit it goes to the right. It will go through the points (0, 7) and (7, 0).

Second equation

  The y-intercept is -2 and the slope is 1/2. That means the line goes up 1 unit for each 2 units it goes to the right. It will go through the points (0, -2) and (4, 0).

The lines will intersect at the point (6, 1), which is the solution found by graphing.

The height of a toy rocket that is shot in the air with an upward velocity of 48 feet per second can be modeled by the function , where t is the time in seconds since the rocket was shot and f(t) is the rocket’s height in feet. What is the maximum height the rocket reaches?

Answers

Answer:

maximum height reached = 35 feet

and [tex]f(t) = 48t-16.07t^{2}[/tex]

Step-by-step explanation:

writing linear motion equations

[tex]s = ut + \frac{1}{2}at^{2}[/tex]

where s is the total displacement, u the initial velocity, t the time travelled, and a is the acceleration.

given u = 48 ft/s, and a = acceleration due to gravity g = -9.8[tex]\frac{m}{s^{2}}[/tex]

1 m = 3.28 feet therefore g becomes -9.8×3.28[tex]\frac{ft}{s^{2}}[/tex]

here negative sigh comes as acceleration due to gravity is in opposite direction of initial velocity.

therefore f(t) becomes [tex]f(t) = 48t-16.07t^{2}[/tex]

to find max height we should find differentiation of f(t) and equate it to 0

therefore we get 48 = 32.144t

t = 1.49 s

therefore max height f(1.49) = 71.67-36.67 = 35 feet

Answer: 36!!!

Step-by-step explanation:

A house increases in value from $30,000 to $120,000 over a period of 40 years. Solve by using the formula r = (F/P) to the 1/n power

Answers

Answer:

The rate at which the value of house increases in 40 years is 1.03  

Step-by-step explanation:

The initial value of house = P = $30,000

The final value of house = F = $120,000

The period for which the value increase = 40 years

Let the rate at which the value increases in 40 years = r%

Now, According to question

The final value of house after n years = The initial value of house × [tex](rate)^{time}[/tex]

i.r F = P × [tex](r)^{n}[/tex]

Or, r = [tex](\frac{F}{P})^{\frac{1}{n}}[/tex]

Or, r = [tex](\frac{120,000}{30,000})^{\frac{1}{40}}[/tex]

Or, r = [tex]4^{\frac{1}{40}}[/tex]

∴  r = 1.03

The rate at which the value increases in 40 years = r = 1.03

Hence,The rate at which the value of house increases in 40 years is 1.03  Answer

Compute 1 + 2 + 3 + 4 + ... +48 +49 + 50.​

Answers

Answer:

1275

Step-by-step explanation:

This is an arithmetic series. The formula for this is Sₙ = (n/2)(a₁ +aₙ)d. a₁ is the first term, so here it is 1, and aₙ is the nth term, or the last term, which is 50 here, but we don't know n.

Now we have to use the equation for an arithmetic sequence to solve for n. A sequence would just be if there was not a last number and it went on forever. that equation looks like aₙ = a₁ + (n - 1)d. Now the only new variable is d, which is the common difference. You can find that by subtracting one term from the term before it, like 2-1 = 1, so d is 1.

We can now solve for n by plugging our numbers into the second equation, so 50 = 1 + (n - 1)1, we can distribute the 1 and to (n-1) and get 50 = 1 + n - 1. Now the ones will cancel and we are left with n = 50

Finally we can plug everything into our original equation and find Sₙ = (50/2)(1+50), which simplifies to Sₙ = 25(51), and Sₙ = 1275.

Answer: 1275


Explanation:

20 points!! Please help!!!

Answers

Answer:

The third option is the correct one.

Step-by-step explanation:

For similar triangles, the angles are the same, but the distances between corresponding vertices is only proportional

The sum of two numbers is 50 and their difference is 4

Answers

Answer:

The numbers are 23,27

Step-by-step explanation:

Let one number be x

Other number = 50 - x

50 - x - x = 4

50 - 2x = 4

-2x = 4 - 50

-2x = - 46

x = -46/-2

x = 23

Other number = 50 - x = 50 -23 = 27

Alinehasaslopeof1andpassesthroughthepoint
(9, 0) . What
isitsequationin
slope -intercept
form?

Answers

Answer: y = x - 9

Step-by-step explanation:

The equation of line slope - point form is given as :

y - [tex]y_{1}[/tex] = m ( x -[tex]x_{1}[/tex]

From the question

m = 1

[tex]x_{1}[/tex] = 9

[tex]y_{1}[/tex] = 0

Substituting into the formula , we have

y - 0 = 1 (x - 9)

y = x - 9

Therefore , the equation of the line in slope - intercept form is given as

y = x - 9

Final answer:

The equation of the line in slope-intercept form is y = x - 9.

Explanation:

The equation of a line in slope-intercept form is y = mx + b, where m represents the slope and b represents the y-intercept. Given that the slope of the line is 1 and it passes through the point (9, 0), we can substitute the values into the equation.

Let's substitute the slope m = 1 and the x-coordinate of the point x = 9:

y = 1(9) + b

Since the point (9, 0) lies on the line, we can substitute the y-coordinate y = 0:

0 = 9 + b

Solving for b, we subtract 9 from both sides:

b = -9

Therefore, the equation of the line in slope-intercept form is y = x - 9.

Solve the following triangle. Given A=51 degrees b=40 c=45

Answers

Answer:

[tex]a=36.87\ units[/tex]

[tex]B=57.47^o[/tex]

[tex]C=71.53^o[/tex]

Step-by-step explanation:

step 1

Find the length side a

Applying the law of cosines

[tex]a^2=b^2+c^2-2(b)(c)cos(A)[/tex]

substitute the given values

[tex]a^2=40^2+45^2-2(40)(45)cos(51^o)[/tex]

[tex]a^2=1,359.4466[/tex]

[tex]a=36.87\ units[/tex]

step 2

Find the measure of angle B

Applying the law of sines

[tex]\frac{a}{sin(A)} =\frac{b}{sin(B)}[/tex]

substitute the given values

[tex]\frac{36.87}{sin(51^o)} =\frac{40}{sin(B)}[/tex]

[tex]sin(B)=\frac{sin(51^o)}{36.87}{40}[/tex]

[tex]B=sin^{-1}(\frac{sin(51^o)}{36.87}{40})=57.47^o[/tex]

step 3

Find the measure of angle C

Remember that the sum of the interior angles in any triangle must be equal to 180 degrees

so

[tex]A+B+C=180^o[/tex]

substitute the given values

[tex]51^o+57.47^o+C=180^o[/tex]

[tex]108.47^o+C=180^o[/tex]

[tex]C=180^o-108.47^o=71.53^o[/tex]

PLZ help really super fast

Answers

Answer:

Option C is true.

Step-by-step explanation:

See the attached diagram.

Since MN is a diameter of the circle at P, so it will always make a right angle at a point on the circumference of the circle.

Therefore, ∠ MLN = 90° as L is a point on the circumference.

Now, given that LM = 2x and LN = 3x, then we have to find MN.

So, applying Pythagoras Theorem, MN² = LM² + LN²

⇒ MN² = 4x² + 9x² = 13x²

MN = x√13

Therefore, option C is true. (Answer)

Screenshot included I need help with this math problem

Answers

Answer:

12/25

Step-by-step explanation:

2/5 ÷ 5/6

To divide by a fraction, multiply by the reciprocal.

2/5 × 6/5

12/25

What is the volume of a rectangular prism with length 12 in., height 16 in., and width 13 in.?
V=lwh   
_in3

Answers

Answer:

2496in3

Step-by-step explanation:

12x16x13=2496in3

Answer:

2496 in³

Step-by-step explanation:

refer to attached graphic

Given:

Length,l = 12 in

height,h = 16 in

width,w = 13 in

Volume,

= lwh

= 12 x 13 x 16

=  2496 in³

problem solving involving rational equation

1. The reciprocal of 5 plus the reciprocal of 7 is the reciprocal of what number?

2.The sum of a number and 6 times its reciprocal is -5. Find the number.

3. The reciprocal of the product of two consecutive intergers is 1/72.

4. The reciprocal of the product of two consecutive integers is 1/42

Answers

Answer:

Step-by-step explanation:

1) 1/5 + 1/7 = 1*7/5*7 + 1*5/7*5

=7/35 + 5/35 = 7+5/35 = 12/35

2) Let the number be x

x +6*1/x = -5

x + 6/x = -5

(x² + 6 ) / x = -5

x² + 6 = -5x

x² +5x + 6 = 0

x² + 3x +2x + 2*3 = 0

x(x+3) + 2(x+3)= 0

(x+3)(x+2) = 0

x + 3 = 0  or x +2 = 0

x = -3    or x = -2

the number is (-3)   or (-2)

Ahsley had a summer lemonade stand where she sold small cups of lemonade for $1.25 And large cups for $2.50. If Ashley sold a total of 155 cups of lemonade for $265, How many cups of each type did she sell.

Answers

Ashley sold 98 small cups and 57 large cups of lemonade.

Step-by-step explanation:

Given,

Price of small cup of lemonade = $1.25

Price of large cup of lemonade = $2.50

Total cups sold = 155

Total worth of cups = $265

Let,

x represent the number of small cups sold

y represent the number of large cups sold

According to given statement;

x+y=155    Eqn 1

1.25x+2.50y=265    Eqn 2

Multiplying Eqn 1 by 1.25

[tex]1.25(x+y=155)\\1.25x+1.25y=193.75\ \ \ Eqn\ 3[/tex]

Subtracting Eqn 3 from Eqn 2

[tex](1.25x+2.50y)-(1.25x+1.25y)=265-193.75\\1.25x+2.50y-1.25x-1.25y=71.25\\1.25y=71.25[/tex]

Dividing both sides by 1.25

[tex]\frac{1.25y}{1.25}=\frac{71.25}{1.25}\\y=57[/tex]

Putting y=57 in Eqn 1

[tex]x+57=155\\x=155-57\\x=98[/tex]

Ashley sold 98 small cups and 57 large cups of lemonade.

Keywords: linear equation, elimination method

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I NEED HELP ASAP!!!
The figure below is a square pyramid where the height of the pyramid is 2 centimeters and the volume is 24 cubic
centimeters. If the volume of a pyramid Bh, then what is the length of the base?
h = 2 cm
V = 24 cm
2 centimeters
4 centimeters
8 centimeters
6 centimeters

Answers

We are Given:

Height of the Pyramid(h) = 2 cm

Volume of the Pyramid = 24 cm³

Base of the Pyramid:

We know that the Volume of a square-based Pyramid:

Volume = a²*(h/3)

24 = a² * (2/3)                 [Replacing the variables]

24 * 3/2 = a²                   [Multiplying both sides by 3/2]

a² = 36

a = 6                               [taking the square root of both sides]

Hence, the length of base of the Pyramid is 6 cm

Final answer:

The length of the base of the square pyramid is 6 centimeters, which is found by solving the equation V = (1/3) * B * h for the area of the base B and then finding the square root of B to get the length of the side.

Explanation:

To determine the length of the base of the square pyramid, we can use the formula for the volume of a pyramid, which is V = (1/3) * B * h, where V is the volume, B is the area of the base, and h is the height of the pyramid. For a square pyramid, the base is a square, so the area of the base B can be expressed as s2, where s is the length of the side of the square.

We are given that the volume V of the pyramid is 24 cm³ and the height h is 2 cm. Using the formula, we can solve for s:

V = (1/3) * s2 * h

24 cm³ = (1/3)  * s^2 * 2 cm

24 cm³ = (2/3) * s^2

s^2 = (24 * 3) / 2

s^2 = 36

s =[tex]\sqrt{36}[/tex]

s = 6 cm

Therefore, the length of the base of the square pyramid is 6 centimeters.

Pls solve the simultaneous equation in the attachment.

Answers

Answer:

Part a) The solution is the ordered pair (6,10)

Part b) The solutions are the ordered pairs (7,3) and (15,1.4)

Step-by-step explanation:

Part a) we have

[tex]\frac{x}{2}-\frac{y}{5}=1[/tex] ----> equation A

[tex]y-\frac{x}{3}=8[/tex] ----> equation B

Multiply equation A by 10 both sides to remove the fractions

[tex]5x-2y=10[/tex] ----> equation C

isolate the variable y in equation B

[tex]y=\frac{x}{3}+8[/tex] ----> equation D

we have the system of equations

[tex]5x-2y=10[/tex] ----> equation C

[tex]y=\frac{x}{3}+8[/tex] ----> equation D

Solve the system by substitution

substitute equation D in equation C

[tex]5x-2(\frac{x}{3}+8)=10[/tex]

solve for x

[tex]5x-\frac{2x}{3}-16=10[/tex]

Multiply by 3 both sides

[tex]15x-2x-48=30[/tex]

[tex]15x-2x=48+30[/tex]

Combine like terms

[tex]13x=78[/tex]

[tex]x=6[/tex]

Find the value of y

[tex]y=\frac{x}{3}+8[/tex]

[tex]y=\frac{6}{3}+8[/tex]

[tex]y=10[/tex]

The solution is the ordered pair (6,10)

Part b) we have

[tex]xy=21[/tex] ---> equation A

[tex]x+5y=22[/tex] ----> equation B

isolate the variable x in the equation B

[tex]x=22-5y[/tex] ----> equation C

substitute equation C in equation A

[tex](22-5y)y=21[/tex]

solve for y

[tex]22y-5y^2=21[/tex]

[tex]5y^2-22y+21=0[/tex]

Solve the quadratic equation by graphing

The solutions are y=1.4, y=3

see the attached figure

Find the values of x

For y=1.4

[tex]x=22-5(1.4)=15[/tex]

For y=3

[tex]x=22-5(3)=7[/tex]

therefore

The solutions are the ordered pairs (7,3) and (15,1.4)

If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g - f)(3)?

Answers

Final answer:

To find (g - f)(3) with given functions f(x) and g(x), subtract f(x) from g(x) to get the new function, then evaluate this function at x = 3. The result is 23.

Explanation:

The student is asking to find the result of the operation (g - f)(3) where f(x) = 4 - x2 and g(x) = 6x. (g - f)(x) means we subtract the function f from the function g, and then evaluate the resulting function at x = 3.

To solve this:

First, find the function g(x) - f(x):g(x) is 6x, and f(x) is 4 - x2, so g(x) - f(x) is 6x - (4 - x2) = 6x - 4 + x2.Next, evaluate this new function at x = 3: (6*3) - 4 + (32) = 18 - 4 + 9 = 23.

So (g - f)(3) is 23.

Andrew wrote the number 186,425 on the board. In which is the value of the digit 6 exactly 10 times the value of the digit 6 in the number Andrew wrote? A. 681,452. B. 462,017. C. 246,412. D. 125,655

Answers

Final answer:

The number where the value of the digit 6 is 10 times the value in the number 186,425 is 462,017, as the 6 is in the ten thousands place, giving it a value of 60,000. The correct answer is option B.

Explanation:

The student is tasked with finding the place value of 6 that is 10 times the value of the 6 in the number 186,425. In 186,425, the 6 is in the thousands place, so its value is 6,000 (6 x 103). Therefore, to find the number where the value of 6 is ten times 6,000, we need a 6 that is worth 60,000. The 6 must be in the ten thousands place to have this value.

Let's inspect the options:

A. 681,452 - Here, the 6 is in the hundred thousands place, so the value of 6 is actually 600,000, which is not 10 times 6,000.

B. 462,017 - The 6 is in the ten thousands place. Here, the value of 6 is 60,000, which is 10 times the value of 6 in the number 186,425.

C. 246,412 - The 6 is in the thousands place again, so the value is 6,000, not 10 times more.

D. 125,655 - The 6 here does not multiply its value since it's in the tens place.

Therefore, the correct answer is option B, where the value of the digit 6 is exactly 10 times the value of the digit 6 in the number Andrew wrote.

In 10 minutes, courtney can write out four christmas cards. In the same time, Victoria can write 14 Christmas cards. If they work together, how long will it take them to write out 252 Christmas cards?

Answers

Answer:

To write 252 cards together Courtney and Victoria will take = 140 minutes or 2 hours and 20 minutes.

Step-by-step explanation:

Given:

Courtney writes 4 cards in 10 minutes

Victoria writes 14 cards in 10 minutes.

To find the time taken by them to  write 252 cards working together.

Solution:

Using unitary method to determine their 1 minute work.

In 10 minutes Courtney writes = 4 cards

So,in 1 minute Courtney will write = [tex]\frac{4}{10}[/tex] cards

In 10 minutes Victoria writes = 14 cards

So,in 1 minute Victoria will write = [tex]\frac{14}{10}[/tex] cards

Now, Courtney and Victoria are working together.

So, in 1 minute, number of cards they can write together will be given as:

⇒ [tex]\frac{4}{10}+\frac{14}{10}[/tex]

Since we have common denominators, so we can simply add the numerators.

⇒ [tex]\frac{18}{10}[/tex]

Again using unitary method to determine the time taken by them working together to write 252 cards.

They can write  [tex]\frac{18}{10}[/tex] cards in 1 minute.

To write 1 card they will take  = [tex]\frac{1}{\frac{18}{10}}=\frac{10}{18}[/tex] minutes

So, for 252 cards the will take = [tex]\frac{10}{18}\times252=\frac{2520}{18}=140[/tex] minutes

140 minutes = (60+60+20) minutes = 2 hours and 20 minutes [ As 60 minutes = 1 hour]

So, to write 252 cards together Courtney and Victoria will take = 140 minutes or 2 hours and 20 minutes.

Final answer:

Courtney and Victoria can write 252 Christmas cards in 140 minutes when working together.

Explanation:

To find out how long it will take Courtney and Victoria to write 252 Christmas cards when they work together, we need to first determine how many cards they can write in 10 minutes individually. Courtney can write 4 cards in 10 minutes, while Victoria can write 14 cards in the same time. Thus, Courtney can write 4/10 = 0.4 cards per minute, and Victoria can write 14/10 = 1.4 cards per minute. When they work together, their combined rate is 0.4 + 1.4 = 1.8 cards per minute.

To determine the total time it will take them to write 252 cards, we can divide the number of cards by their combined rate: 252 / 1.8 = 140 minutes. Therefore, it will take them 140 minutes to write out 252 Christmas cards when they work together.

GEOMETRY! PLEASE HELP!!!

Answers

Answer:

Option C is correct.

Step-by-step explanation:

See the diagram attached.

Given that YZ bisects MO, hence, MZ = ZO ........ (1)

If we want to prove that point N is equidistant from points M and O, then we have to prove that Δ MNZ ≅ Δ ONZ, so that we can prove that MN = ON.

Now, to prove Δ MNZ ≅ Δ ONZ, we must have another condition that MO ⊥ YZ or, NZ ⊥ MO.

So, we have (i) MZ = OZ {from equation (1)}

(ii) ∠ NZM = ∠ NZO = 90° {Since, NZ ⊥ MO} and  

(iii) NZ is the common side

Hence, by SAS criteria it is proved that Δ MNZ ≅ Δ ONZ and hence, proved that MN = ON.

Therefore, option C is correct. (Answer)

A = 82 – 8°
B = 5x + 25°
Solve for x and then find the measure of B:

Answers

Answer:

x = 11

m∠B = 80°

Step-by-step explanation:

If two parallel lines are cut by a transversal, the corresponding angles are congruent

m∠A = m∠B

8x - 8 = 5x + 25 ... minus 5x and add 8 both side

8x - 5x = 25 + 8

3x = 33

x = 11

m∠B = 5 x 11 + 25 = 80°

check: m∠A = 8 x 11 -8 = 80


At the beginning of the year,
Shelby could run 2 miles. Now
she can run 3.5 miles. What is
the percent increase in the
distance she can run?

Answers

Answer:

75%

Step-by-step explanation:

2 x 1.75 = 3.5

The required percentage increase in the distance she can run is 75%.

What is the percentage?

The percentage is the ratio of the composition of matter to the overall composition of matter multiplied by 100.

Here,
Shelby could run 2 miles.
she can run 3.5 miles.
percentage increase = 3.5 - 2 / 2 × 100%
percentage increase = 75%

Thus, the required percentage increase in the distance she can run is 75%.

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M is the midpoint line cd, where C is (-1,-1) and M is (3,5). Find the coordinates of D

Answers

Answer:

The coordinates of point D are (7,11)

Step-by-step explanation:

we know that

The formula to calculate the midpoint between two points is equal to

[tex]M(\frac{x1+x2}{2},\frac{y1+y2}{2})[/tex]

In this problem we have

[tex]M=(3,5)\\C(x1,y1)=(-1,-1)\\D(x2,y2)=?[/tex]

substitute the given values

[tex](3,5)=(\frac{-1+x2}{2},\frac{-1+y2}{2})[/tex]

Solve for x2

[tex]\frac{-1+x2}{2}=3[/tex] ---> [tex]-1+x2=6[/tex] --->[tex]x2=6+1=7[/tex]

Solve for y2

[tex]\frac{-1+y2}{2}=5[/tex] ---> [tex]-1+y2=10[/tex] ---> [tex]y2=10+1=11[/tex]

therefore

The coordinates of point D are (7,11)

A scale model of a house is 1 foot long the actual house is 36 feet long in the model the door is 2 inches high how many feet high is the actual door

Answers

Final answer:

To find the actual height of the door based on a scale model, the scale factor between the model and the actual house (1:36) is used, leading to the conclusion that the real door is 6 feet high.

Explanation:

The question involves scale and measurement to find the actual height of the door of a real house based on its scale model. The scale model of the house is 1 foot long, and the actual house is 36 feet long. The door in the model is 2 inches high. To find the actual height of the door, we use the scale factor between the model and the real house.

First, we identify the scale factor: Since the model house is 1 foot long and the actual house is 36 feet long, the scale factor is 1:36. Next, we convert the height of the door from inches to feet in the model scale (since 1 foot = 12 inches, 2 inches = 1/6 feet). Using the scale factor, the height of the actual door is calculated as follows:

Height in the model (in feet) x Scale factor = Height of the actual door

1/6 feet x 36 = 6 feet

Therefore, the actual height of the door is 6 feet.

Final answer:

The height of the actual door is 6 feet, calculated using the scale factor of 1:36 from the 2-inch model door height.

Explanation:

To find the height of the actual door from the scale model measurements, we first need to determine the scale factor between the model and the real house. The scale model is 1 foot long, and the actual house is 36 feet long, which means that the scale factor is 1:36. This implies that every inch on the model would represent 36 inches (or 3 feet) on the actual house. Since the door on the model is 2 inches high, we can calculate the height of the actual door by multiplying the model door height (2 inches) by the scale factor.

So, height of actual door = 2 inches * 36 inches/inch = 72 inches.

To convert 72 inches to feet, we divide by 12, since there are 12 inches in a foot.

Therefore, height of actual door in feet = 72 inches / 12 inches/foot = 6 feet.

The actual door is 6 feet high.

please help on this 7th grade question


Which choice has a value that is closest to the value of the following expression? 17/12 - 49/40


A. 1/4


B. 1/5


C. 1/6


D. 1/7

Answers

Option B

The choice has a value that is closest to the value of the following expression 17/12 - 49/40 is [tex]\frac{1}{5}[/tex]

Solution:

Given that we have to find the value that is closest to the value of following expression

[tex]\frac{17}{12} - \frac{49}{40}[/tex]

Let us take L.C.M of denominators and solve the sum

L.C.M of 12 and 40

List all prime factors for each number

prime factorization of 12 = 2 x 2 x 3

prime factorization of 40 = 2 x 2 x 2 x 5

For each prime factor, find where it occurs most often as a factor and write it that many times in a new list.

The new superset list is

2, 2, 2, 3, 5

Multiply these factors together to find the LCM.

LCM = 2 x 2 x 2 x 3 x 5 = 120

Thus the given expression becomes:

[tex]\rightarrow \frac{17 \times 10}{12 \times 10} - \frac{49 \times 3}{40 \times 3}\\\\\rightarrow \frac{170}{120} - \frac{147}{120}\\\\\rightarrow \frac{170-147}{120}\\\\\rightarrow \frac{23}{120} = 0.1916 \approx 0.2[/tex]

[tex]0.2 = \frac{1}{5}[/tex]

Thus correct answer is option B

Answer:

B

Step-by-step explanation:

the original price for a motorcycle was $11,000. The sale price this week is $9799. What is the percent decrease to the nearest percent?​

Answers

Answer:

11%

Step-by-step explanation:

To fine the percentage decrease, we use the formula change/original x 100. In this case, the change is $11000-$9799=$1201 while the original is $11000. So 1201/11000 x 100 = 10.9% ≈ 11%

ABCD is a quadrilateral-shaped field in which diagnol BD is 36m, AL perpendicular to BD and CM perpendicular to BD such that AL=19m and CM=11m. Find the area of the field

Answers

Answer:

Area of the field is 540 m².

Step-by-step explanation:

ABCD is the given quadrilateral in which diagonal BD is 36 m.

Now, AL ⊥ BD and CM ⊥ BD. Also, AL = 19 m and CM = 11 m.

Now, we have to calculate the area of quadrilateral shaped field ABCD.

At first, we will find the area of ΔABD and ΔBCD and then we will add the area of both the triangles to get the area of the quadrilateral shaped field.

Now, ΔABD and ΔBCD are both right angled triangles.

So,

[tex]area\; of \; triangle \; ABD = \frac{1}{2} \times base\times height[/tex]

[tex]=\frac{1}{2}\times BD\times AL=\frac{1}{2}\times36\times19=342\; m^{2}[/tex]

[tex]area \; of \; triangle\; BCD = \frac{1}{2}\times BD\times CM=\frac{1}{2}\times36\times 11 = 198\; m^{2}[/tex]

So, area of field ABCD = area of ΔABD + area of ΔCBD

= 342 + 198

= 540 m²

So, the area of quadrilateral shaped field is 540 m².

heather, rafael, and tom have a total of $101 in their wallets. Rafael had 3 times what tom has. tom has $9 more than heather. how much do they have in their wallets

Answers

Answer:

A) H + R + T = 109

B) R = 3T

C) T = H + 9 combining equation B) with equation A)

A) H + 4T = 109 combining C) with A)

A) T -9  + 4T = 109

A) 5T = 118

Tom has 23.60 dollars

We put this information into equation B)

R = 3*23.60

Rafeal has 70.80 dollars

Putting this into Rafael and Ton into equation A)

A) H + 70.80 + 23.60 = 109

Heather has 14.60 dollars

Step-by-step explanation:

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