Sara worked 45 hours one week, of which 5 hours were overtime. She earned $10.48 per hour and gets paid time and a half for overtime. How much did she earn for the week?

Answer:

time upstream=24/8=3 hours

time downstream=24/12=2 hours

Step-by-step explanation:

If R*T=D, and R is speed + or - current, how can you find the rate without the time, and how can you find the time without the rate?

THE KEY WAS WHEN WE WERE TOLD THAT IT TAKES ONE HOUR LONGER TO GO UPSTREAM THAN DOWNSTREAM BECAUSE T=D/R AND WE ARE TOLD THAT:

D/R(Upstream) minus 1 equals D/R (DOWNSTREAM)

Let x=rate of current

distance(d)=rate(r) times time(t) or d=rt or t=d/r

distance upstream=distance downstream=24 mi

rate upstream=10-x

rate downstream=10+x

time upstream=(distance upstream)/(rate upstream)=24/(10-x)

time downstream=(distance downstream)/(rate downstream)=24/(10+x)

Now, we are told that time upstream minus one hour equals time downstream. So our equation to solve is:

24/(10-x)-1=24/(10+x) Multiply both sides by (10-x)(10+x)

24(10+x)(10-x)/(10-x)-1(10-x)(10+x)=24(10-x)/(10+x)/(10+x) clear fractions

24(10+x)-(10-x)(10+x)=24(10-x) clear parens

240+24x-100-10x+10x+x^2=240-24x subtract 240 from and add 24x to both sides

240-240+24x+24x-100+x^2=240-240-24x+24x collect like terms

x^2+48x-100=0 ----------------quadratic equation in standard form

This equation can be factored:

(x+50)(x-2)=0

x=-50 mph----------------discount the negative value for speed

and

x=2 mph----------------------speed of the current

CK

10-x=10-2= 8 mph -----------------------speed upstream

10+x=10+2=12 mph--------------------------speed downstream

time upstream=24/8=3 hours

time downstream=24/12=2 hours

so 3-2=1----takes 1 hour longer upstream

Answer:

Speed = 10.42 m/secs

Step-by-step explanation:

We have been given with:-

Distance = 100m

Time taken = 9[tex]\frac{3}{5}[/tex] secs

1) First, we need to convert the mixed number 9[tex]\frac{3}{5}[/tex] to an improper fraction.

Method to convert a mixed number to an improper fraction

[tex]a\frac{b}{c} = \frac{c*a+b}{c}[/tex]

Applying the above formula, we get

9[tex]\frac{3}{5}[/tex] = [tex]\frac{5*9+3}{5}[/tex]

= [tex]\frac{45+3}{5}[/tex]

= [tex]\frac{48}{5}[/tex]

2) Now we need to convert [tex]\frac{48}{5}[/tex] into a decimal by dividing 48 by 5.

We get time taken as 9.6 secs

3) We need to find the speed using the below formula:-

Speed = [tex]\frac{Distance}{Time taken}[/tex]

Plugging the values of Distance and Time taken into the formula, we get

Speed = [tex]\frac{100}{9.6}[/tex]

= 10.416 m/secs

4) Upon rounding it to the nearest hundredth, we get

Speed = 10.42 m/secs

Answer:

4:!

Step-by-step explanation:

4:1 because their are 4 boys for every 1 girl

Answer:

The period is [tex]\dfrac{10\pi}{9}[/tex] and the amplitude is 3.

Step-by-step explanation:

The period goes from one peak to the next (or from any point to the next matching point). The amplitude is the height from the center line to the peak.

The period of the function [tex]y=a\cos (bx)[/tex] is [tex]T=\dfrac{2\pi }{b}[/tex] and the amplitude is [tex]|a|.[/tex]

Consider the function [tex]f(t)=3\cos \left(\dfrac{9}{5}t\right).[/tex]

The period for the function [tex]f(t)[/tex] is

[tex]T=\dfrac{2\pi}{\frac{9}{5}}=\dfrac{2\pi}{1}\cdot \dfrac{5}{9}=\dfrac{10\pi}{9}[/tex]

and the amplitude is 3.

The amplitude of the function f(x) = 3cos(9/5 t) is 3, and the period is approximately 3.4907 units of time.

The amplitude of the function f(x) = 3cos(9/5 t) is 3. This is because the amplitude A of a cosinusoidal function of the form x(t) = Acos(wt + φ) is the coefficient in front of the cosine, which describes the peak-to-peak swing of the wave.

The period T of the function can be found using the relationship between angular frequency w and the period T, which is T = 2π/w. Here, the angular frequency w is 9/5. Thus, the period T is 2π × (5/9), which simplifies to approximately 3.4907 units of time.

The proportional relationship between x and y is;

x 7 14 28 35

y 1 2 4 5

The correct option is D.

Proportional relationships between x and y satisfy the following equation;

[tex]\rm y=kx[/tex]

Where k is some constant.

Rearranging the equation;

[tex]\rm y=kx\\\\k=\dfrac{y}{x}[/tex]

Then,

The proportional relationship between x and y is;

[tex]\rm k = \dfrac{y}{x}\\\\\rm When \ x= 7 \ and \ y= 1\\\\K=\dfrac{1}{7}\\\\\rm When \ x= 14 \ and \ y= 2\\\\K=\dfrac{2}{14}=\dfrac{1}{7}\\\\\rm When \ x= 28 \ and \ y= 4\\\\K=\dfrac{4}{28}=\dfrac{1}{7}\\\\\rm When \ x= 35 \ and \ y= 5\\\\K=\dfrac{5}{35}=\dfrac{1}{7}[/tex]

Hence, the proportional relationship between x and y is the correct option is D.

To know more about proportional relationships click the link given below.

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Answer:   88 Feet Per Second

Step-by-step explanation:  

Firstly you need to know 3 things:  

> 60 mph = 60 Miles Per Hour  

> 1 Hour = 60 mins = 60*60 = 3600 seconds  

> 1 Mile = 5280 feet  

Next you can change the miles to feet and hours to seconds.  

60 mi/ 1 hour = 60*5280/ 3600 = 316800ft/ 3600sec  

Now time to reduce that big fraction! (Or in this case just divide by 3600 sec)  

316800ft/ 3600sec  

= 88ft/1sec  

= 88 Feet Per Second  

Hope that helps!

Answer:

Your y-intercept is 1 and your slope is 2

Step-by-step explanation:

How to find Slope

To find your slope you have to do the change of y over the change of x. So if you go to your table find how much each value of numbers is changing by. Your y-values are changing differently, but it is fine so to get to 5 from 3 you add 2 and to get to 9 from 5 you add 4. You do the same thing for the x-values are changing differently, but it is fine, so to get to -1 from -2 you add 1 and to get  to 1 from -1 you add 2. Next you will take the two values that you get on the y side which are 2 and 4 and the x side which are 1 and 2 and put them in change of y over change of x. So 4/2 with equal 2 and 2/1 equal 2. So the slope is changing by 2.

Answer:

Option A is the correct choice.

Step-by-step explanation:  

We have been given the system of linear equations written by Draco. We are asked to find Draco's error.

Let us form a system of equations using our given information.

Let m represent the price of one muffin and b represent the cost of one bagel.

We are told that in one hour a bakery sold five muffins and nine bagels for a total of $25.50. We can represent this information in an equation as:

[tex]5m+9b=25.50...(1)[/tex]

The next hour the bakery sold three muffins and 12 bagels for a total of $28.50. We can represent this information in an equation as:

[tex]3m+12b=28.50...(2)[/tex]

Now let us see system of equations written by Draco.

[tex]5m+9b=28.50[/tex]

[tex]3m+12b=25.50[/tex]

We can see that Draco has set the price of 5 muffins and 9 bagels equal to $28.50, which is the price of 3 muffins and 12 bagels.

Therefore, Draco should have set the first equation equal to 25.50 and the second equation equal to 28.50. The correct choice is option A.

Answer:

The value of x is -0.5.

Step-by-step explanation:

The given equation is

[tex]-2(5x-6)+6x=4(x+4)[/tex]

Use distributive property to solve the above equation.

[tex]-2(5x)-2(-6)+6x=4(x)+4(4)[/tex]

[tex]-10x+12+6x=4x+16[/tex]

[tex]-4x+12=4x+16[/tex]

Add 4x both sides.

[tex]12=8x+16[/tex]

Subtract 16 from both sides.

[tex]-4=8x[/tex]

Divide both sides by 8.

[tex]\frac{-4}{8}=\frac{8x}{8}[/tex]

[tex]-0.5=x[/tex]

Therefore value of x is -0.5.

Answer:

[tex]x=475[/tex] units

Step-by-step explanation:

Method 1

The given revenue function is [tex]R(x)=95x-0.1x^2[/tex].

We rewrite this function in the vertex form by completing the square.

[tex]\Rightarrow R(x)=-0.1x^2+95x[/tex].

[tex]\Rightarrow R(x)=-0.1(x^2-950x)+0[/tex].

We add and subtract half the coefficient of [tex]x[/tex] multiplied by a factor of [tex]-0.1[/tex], which is [tex]-0.1(-\frac{950}{2})^2=-0.1( -475)^2[/tex] to get,

[tex]R(x)=-0.1(x^2-950x)+-0.1(-475)^2--0.1(-475)^2 +0[/tex].

We factor [tex]-0.1[/tex] out of the first two expressions again to get,

[tex]R(x)=-0.1(x^2-950x+(-475)^2)--0.1(-475)^2 +0[/tex].

We now got a perfect square.

[tex]\Rightarrow R(x)=-0.1(x-475)^2+22562.5[/tex].

Therefore the maximum revenue occurs when [tex]x=475[/tex] units were sold.

Method 2

Use derivatives to find the x-value of the maximum point.

[tex]R(x)=-0.1x^2+95x[/tex]

[tex]R'(x)=-0.2x+95[/tex]

At maximum point,

[tex]R'(x)=0[/tex]

[tex]\Rightarrow -0.2x+95=0[/tex].

[tex]\Rightarrow -0.2x=-95[/tex].

[tex]\Rightarrow x=\frac{-95}{-0.2}[/tex].

[tex]\Rightarrow x=475[/tex].

The maximum revenue is achieved when 475 units are sold in the given function R = 95x - 0.1x^2, which was determined by taking the first and second derivatives of the revenue function.

In order to find the number of units that produce maximum revenue in the equation R = 95x - 0.1x^2, you have to differentiate the revenue function R with respect to x and set the derivative (first derivative) equal to 0 to find the critical points.

The derivative of the function R with respect to x is R' = 95 - 0.2x. Setting this equal to zero gives: 95 - 0.2x = 0. Solving for x provides x = 95/0.2 = 475. Hence, 475 units sold will maximize revenue according to the provided revenue function.

To confirm this is a maximum, you can use the second derivative test. The second derivative of R, R'' = -0.2. Since this value is negative, x = 475 indeed corresponds to a maximum point on the graph of R(x). Hence, maximum revenue is achieved when 475 units are sold.

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Answer:

Its A.

Step-by-step explanation:

Because, I have the same question for my test online and the greater than sign with out the under marking is correct.

$960

720÷30=24

24×40=960

Answer:

B

Step-by-step explanation:

Answer:

If you mean it's 89 feet, the answer is 415.3333 yards.

If you mean it's 89 yards, the answer is 1246 yards.

Step-by-step explanation:

Multiply 14 and 89 to get the distance of 14 identical cranes.

Since your question had two types of distance,

Feet: Divide by 3 since the conversion of feet to yards is 1/3.

Yards: Don't convert to a mile, as a mile is alot larger, and you will have a small answer.

Hope this helps.

The total length of cable on 14 identical cranes, each with a cable 89 yards long, would be approximately 0.71 miles.

The question you're asking involves measurement conversion and multiplication. If each cable is 89 yards long, and one yard is equivalent to 3 feet, then we first need to convert the length of each cable into feet. Therefore, 89 yards equal to 89*3 = 267 feet. Thereafter, to determine the total length of cable that 14 identical cranes would have, we simply multiply 267 feet by 14, which gives us 3,738 feet.

Bigger unit for feet is in miles, and we know 1 mile is equal to 5,280 feet, so to convert the total feet to miles, you divide the total length in feet by the number of feet in a mile. Hence 3,738 divided by 5,280 equals approximately 0.71 miles.

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Heya!

Your question states: Solve for x in simplest form 15 = 1/3(x+9)

Answer: X = 36

Numerical Explanation:

1. Step by step

   I. 15 = 1/3(x+9)

2. Simplify both sides of the equation:

    II. 15 = 1/3x + 3

3. Flip the equation:

      III. 1/3x + 3 = 15

4. Subtract 3 from both sides:

          IV. 1/3 x +3 = 15

                          -3    -3

5.  Multiply both sides by 3:

              V.  3 * (1/3 x) = (3) * (12)

6. Final answer:

                  VI. x = 36

I Hoped I Helped!

~KINGJUPITER

Answer:

x = 36

Step-by-step explanation:

Note the equal sign, what you do to one side, you do to the other. Isolate the variable, x. Do the opposite of PEMDAS:

Remember to follow PEMDAS and the left -> right rule.

PEMDAS:

Parenthesis

Exponent (& roots)

Multiplication

Division

Addition

Subtraction

----------------

15 = 1/3(x + 9)

First, multiply 3 to both sides of the equation

(15)(3) = (1/3(x + 9))(3)

(15)(3) = x + 9

45 = x + 9

Next, to isolate the x, subtract 9 from both sides

45 (-9) = x + 9 (-9)

45 - 9 = x

36 = x

-----------

36 is your answer for x.

~

y = 2x² - 12x + 21 = 2(x² + 6x) + 21.

Using the complet the square method, you get:

2(x² + 6x) + 21 = 2(x² + 6x + 9) - 2*9 + 21 = 2(x + 3)² + 3.

So the axis of symmetry is: x = -3.

The vertex is: (-3, 3)

Answer: 2(x + 3)² + 3

Explanation: Axis of symmetry: x = -3 Vertex: (-3, 3)

Answer: Choice B) 5/8

================================================

Explanation:

There are 10 dots that represent a measurement larger than 1/2 a foot (either the dot is over 5/8 or 3/4 or 7/8). Call this value A, so A = 10.

There are 16 dots total. Call this B, so B = 16.

Divide A over B and then reduce: A/B = 10/16 = 5/8 so that is why the answer is choice B

Coincidentally, we end up with 5/8 but that is not the same as the "5/8" as shown on the chart. It just means that if we had 8 people, the 5 of them would have a foot size larger than half a foot.

Answer:

Step-by-step explanation:

The equation of the line through (5,6) has a slope of 2 will be y=2x-4.

A straight line is a combination of endless points joined on both sides of the point.

The slope 'm' of any straight line is given by:

A linear equation has the form y = mx + b in the slope-intercept format. X and Y are the variables in the equation. The values m and b represent the line's slope (m) and the value of y when x is 0.

[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]

It is given that, the line passes through (-10,-7)and (-5,-9).

We have to find the equation of the line through given points,

The slope of the line is,

m= 2

The equation of the line is obtained as,

y-y₁=m(x-x₁)

y-(6)=-2(x-(5)

y-6=2x-10

y=2x-10+6

y=2x-4

Thus, the equation of the line through (5,6) has a slope of 2 will be y=2x-4.

Learn more about the straight line here:

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Final answer:

To find the equation of the line with a slope of 2 passing through the point (5,6), we use the point-slope formula and obtain y = 2x - 4.

Explanation:

To write an equation of a line that passes through a given point, such as (5,6), with a given slope of 2, we can use the point-slope form of a linear equation, which is: y - y1 = m(x - x1), where m is the slope and (x1, y1) is a point on the line. Substituting the given point and slope into this formula, we have:

y - 6 = 2(x - 5)

Expanding this equation and solving for y, we get:

y - 6 = 2x - 10

Add 6 to both sides to find the y-intercept:

y = 2x - 4

This equation represents the line with a slope of 2 that passes through the point (5,6).

Answer:

3710

Step-by-step explanation:

265 * 14    

multiply 4 by 5, then 4 by 6, then 4 by 2 which would look like this 860

then you multiply 1 by 5, then 1 by 6, then 1 by 2 which should loo like 2650

it looks like that because for every digit you multiply by except the first you add a zero in front of it. then you add those two up which adds up to 3710 you're welcome. :}

Answer:

3,710

Step-by-step explanation:

First, write it in a multiplication form. (staking on top of each other)

First Step: Multiply the 5 and the 4 in the one's column. 20. So regroup the 2 and place the zero under the 4. Then you multiply the 5 and the one. 5. Also ad what you regrouped it to be. 7. Place that number under the 1 in 14.

Second Step: Add a zero in the ones place. Then multiply the 5 and the 1. 5.  Then you multiply the 6 and the 1. 6. Then lastly multiply the 2 and the one.

Third Step: Now add the two numbers to multiplied together to get your final answer.

Have a Nice Winter Break!

:-)

You don't have to mark me as brainliest though.

Pls mark the other person as brainliest!

Answer:

AB = JK = 49

Step-by-step explanation:

Since ABC = JKL

We know the length of AB has to equal the length of JK.

AB = JK

14x+7 = 5x+34

Subtract 5x from each side.

14x-5x +7 = 5x-5x+34

9x+7 = 34

Subtract 7 from each side

9x+7-7 = 34 -7

9x = 27

Divide each side by 9.

9x/9 = 27/9

x =3

AB = 14x+7

Substitute x=3

      14(3) +7

      42+7

AB =    49

f  ( x ) =  3 x −  1

Hope that helps

Put the value of x = 6 to the eqpression 5x² + x - 7:

5(6)² + 6 - 7 = 5(36) + 6 - 7 = 180 + 6 - 7 = 179

Answer:

9[tex]\sqrt{85}[/tex]

Step-by-step explanation:

9v = 9(2i + 9j) = 18i + 81j

|9v | = [tex]\sqrt{18^2+81^2}[/tex] = [tex]\sqrt{x6885}[/tex] = 9[tex]\sqrt{85}[/tex]

Answer:

42 minutes

Step-by-step explanation:

There are 60 minutes in an hour and we want to find 0.7 of that. Of means multiply so we multiply 60 by 0.7 and we get 42 minutes.

Final answer:

To convert the job time of 0.7 hours to minutes for the engine repair job, multiply it by 60, resulting in an approximate job time of 42 minutes.

Explanation:

You have been given an engine repair job that has a job time of 0.7 hour. To find out how many minutes you should allow for the job, convert hours to minutes. Since there are 60 minutes in one hour, you would perform the following calculation:

Multiply 0.7 (hours) by 60 (minutes per hour).

0.7 hour * 60 minutes/hour = 42 minutes

You should therefore allow for approximately 42 minutes to complete the engine repair job.

Answer: The area is 572.5566

Step-by-step explanation:

27÷2=r=13.5

A=πr²

A=3.1416(π) · 13.5²(r)

A=572.5566

Answer:

Given:

Diameter= 27 inches

radius= d/2

        =27/2

        =13.5

Let's read this in a more proper way.

The number of boys in Mr. Watson's class is 2/3 the number of girls. So:

[tex]18 * \frac{2}{3} = 12\\18 + 12 = 30[/tex]

There are 30 students in Mr. Watson's class.

For this ratio to be in true in the second problem (306 boys, 459 girls), 306 must be 2/3 of 459.

[tex]459 * \frac{2}{3} = 306[/tex]

The ratio holds true for the second problem.

30 students,

Yes it is possible, because 306 is 2/3 of 459.

Answer:

You must have all A's for Honor roll.

Step-by-step explanation:

My sister is in it and she has all A's

A 3.4 unweighted GPA is generally considered good and may qualify for the honor roll, depending on your school's criteria.

Based on your grades, you have a 3.4 unweighted GPA.

To determine if this qualifies you for the honor roll, it would be best to check your school's specific requirements, as they can vary.

Typically, a 3.4 GPA is considered solid and may be sufficient for honor roll status in many high schools.

Here is a breakdown of your grades:

While you have mostly As and Bs, the C in Spanish 2 may affect your honor roll eligibility depending on your school's criteria.

Answer:

Zero Product Property

Step-by-step explanation:

The zero product property states that anything multiplied by 0 is 0.

Answer:

The vertices are:

A' = (-3, -3)

B' = (3, -3)

C' = (3, 3)

D' = (-3, 3)

Step-by-step explanation:

Given:

A 2 x 2 square is centered at the origin.

So, the center of the square is (0, 0)

Since it is 2 x 2 square, the side of the square is 2 units.

So, the vertices of the 2 x 2 square are A (-1, -1),  B(1, -1), C(1. 1), D(-1, 1)

The above square is dilated by a factor of 3.

Let's name the dilated square A'B'C'D'

To find the coordinates of the vertices of dilated square, we need to multiply each vertices of ABCD by 3.

A(-1, -1) = 3(-1, -1) = A'(-3, -3)

B(1, -1) = 3(1, -1) = B'(3, -3)

C(1, 1) = 3(1, 1) = C'(3, 3)

D(-1, 1) = 3(-1, 1) = D'(-3, 3)