Please help me with 3 please

Please Help Me With 3 Please

Answers

Answer 1

a. The solution set is (-3,2)

b. The solution set is (2,6)

c. The solution set is (1,1)

d. The solution set is (-0.5,1.5)

e. The solution set is (7.5, -4.5)

f. The solution set is (-2,7)

Step-by-step explanation:

a. x+2y=1   Eqn 1

   x=y-5      Eqn 2

Putting value of x from Eqn 2 in Eqn 1

[tex](y-5)+2y=1\\y-5+2y=1\\3y=1+5\\3y=6[/tex]

Dividing both sides by 3

[tex]\frac{3y}{3}=\frac{6}{3}\\y=2[/tex]

Putting y=2 in Eqn 2

[tex]x=2-5\\x=-3[/tex]

The solution set is (-3,2).

b. y-x=4    Eqn 1

   y=3x     Eqn 2

Putting value of y from Eqn 2 in Eqn 1

[tex]3x-x=4\\2x=4[/tex]

Dividing both sides by 2

[tex]\frac{2x}{2}=\frac{4}{2}\\x=2[/tex]

Putting x=2 in Eqn 2

[tex]y=3(2)\\y=6[/tex]

The solution set is (2,6)

c. y = x     Eqn 1

  y = -x+2   Eqn 2

Putting value of y from Eqn 1 in Eqn 2

[tex]x=-x+2\\x+x=2\\2x=2[/tex]

Dividing both sides by 2

[tex]\frac{2x}{2}=\frac{2}{2}\\x=1[/tex]

Putting x=1 in Eqn 1

[tex]y=1[/tex]

The solution set is (1,1)

d. y=5x+4    Eqn 1

   x+3y=4     Eqn 2

Putting value of y from Eqn 1 in Eqn 2

[tex]x+3(5x+4)=4\\x+15x+12=4\\16x=4-12\\16x=-8[/tex]

Dividing both sides by 16

[tex]\frac{16x}{16}=\frac{-8}{16}\\x=-0.5[/tex]

Putting x= -0.5 in Eqn 1

[tex]y=5(-0.5)+4\\y=-2.5+4\\y=1.5[/tex]

The solution set is (-0.5,1.5)

e. x-y=12   Eqn 1

   y = 3-x   Eqn 2

Putting value of y from Eqn 2 in Eqn 1

[tex]x-(3-x)=12\\x-3+x=12\\2x=12+3\\2x=15[/tex]

Dividing both sides by 2

[tex]\frac{2x}{2}=\frac{15}{2}\\x=7.5[/tex]

Putting x=7.5 in Eqn 2

[tex]y=3-7.5\\y=-4.5[/tex]

The solution set is (7.5, -4.5)

f. 2x+y=3      Eqn 1

  x+y=5       Eqn 2

From Eqn 2;

y = 5-x

Putting in Eqn 1

[tex]2x+(5-x)=3\\2x+5-x=3\\x=3-5\\x=-2[/tex]

Putting x=-2 in Eqn 1

[tex]2(-2)+y=3\\-4+y=3\\y=3+4\\y=7[/tex]

The solution set is (-2,7).

Keywords: linear equation, substitution method

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Related Questions

Use transformation (-2pie,2pie) with Y=2cos(x)-1

Answers

Answer:

See attachment

Step-by-step explanation:

We want to graph

[tex]y = 2 \cos(x) - 1[/tex]

on the interval (-2π, 2π)

First we graph

[tex]y = \cos(x)[/tex]

Then we stretch vertically by a factor of 2 and shift down 1 unit.

Since the amplitude is 2 and the graph is shifted down 1 unit, the range of the transformed graph is

[tex] - 3 \leqslant y \leqslant 1[/tex]

The graph is shown in the attachment

Find the value of the polynomial 3xy+7x2−3x2y+3y2x−2x2−2xy+4x2y−2y2x, when x=1 and y=−2

Answers

9514 1404 393

Answer:

  5

Step-by-step explanation:

The evaluation can be easier if terms are collected first.

  3xy+7x^2−3x^2y+3y^2x−2x^2−2xy+4x^2y−2y^2x

  = x^2y(-3+4) +xy^2(3-2) +x^2(7-2) +xy(3-2)

  = x^2y +xy^2 +5x^2 +xy

  = x(xy +y^2 +5x +y)

Filling in the numbers, we have ...

  = (1)(1(-2) +(-2)^2 +5(1) +(-2))

  = -2 +4 +5 -2

  = 5

The value of the polynomial is 5.

g(5x + 9) = g(9x + 2)

Answers

Answer:

x = 7/4   or  x = 1.75  or  x = 1 and 3/4

they all mean the same thing but there just in different forms (decimal form, fraction form, and mixed number form)

Lamont works for an electric utility and is installing a 40 foot utility pole as shown. Lamont drills the anchor of a support cable into the ground 15 feet from the base of the pole. What is the minimum length of cable Lamont needs?

Answers

Answer:

Approximately 43 feet of minimum cable is needed.

Step-by-step explanation:

This problem can be solved using Trigonometry and Pythagorean theorem. Pythagorean theorem applies on right-triangles (which are known to have one 90° angle). The theorem states that the square of the Hypotenuse is obtained by the squared sum of the other two sides of the triangle (i.e the two sides forming the 90° angle - with the hypotenuse side being across it as:

[tex]h^2=a^2+b^2[/tex]           Eqn. (1)

where

[tex]h[/tex] is the hypotenuse

[tex]a[/tex] is a side

[tex]b[/tex] is a side

Now in this case, the utility pole must be perpendicular to the ground and the anchor being parallel to the ground, and a 90° angle formed between them. Conclusively the cable length will be represented by the hypotenuse in a right triangle. So here we have [tex]a=40ft[/tex] and [tex]b=15ft[/tex]. Plugging in Eqn.(1) and solving for [tex]h[/tex] we have:

[tex]h^2=40^2+15^2\\h=\sqrt{40^2+15^2} \\h=\sqrt{1600+225}\\ h=\sqrt{1825}\\ h=5\sqrt{73}\\ h=42.72ft[/tex]

So we conclude that the minimum length of cable needed by Lamont is

43 feet (rounded up).

Here's another, Thanks. (3/5)

Answers

You are correct. The scale factor is 1/5 = 0.2

Nice work.

Evaluate the expression 1/3 (4+18) 4

Answers

Answer:

29 1/3

Step-by-step explanation:

1/3 (4 + 18) 4

1/3 (22) 4

7 1/3 x 4

29 1/3

Twenty nine and one third is your answer.

Final answer:

The expression 1/3 (4+18) 4 evaluates to approximately 29.333 following the order of operations; first the addition inside the parentheses, then multiplication by 1/3, and lastly by 4.

Explanation:

When evaluating the expression 1/3 (4+18) 4, it's essential to follow the orders of operation, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication, and Division (from left to right), Addition and Subtraction (from left to right)). Let's break down the problem step by step:

First, handle the operations inside the parentheses: 4 + 18 = 22.Multiply by the fraction outside, which is 1/3 of 22: (1/3) * 22 = 22/3.Finally, multiply by the last number, which is 4: (22/3) * 4.

Now, perform the multiplication: 22 * 4 = 88. Since we are multiplying by a division by 3 (22/3), it is the same as dividing 88 by 3, which gives us the final answer: 88 divided by 3 equals 29 with a remainder of 1, or as a decimal, approximately 29.333.

The correct answer to the expression 1/3 (4+18) 4 is therefore approximately 29.333. It is crucial to always follow the order of operations in any math problem to get the correct result.

A 10ounce container of milk contains 200 claories how many calories does each ounce of milk have

Answers

Each ounce of milk contains 20 calories, because 200/10 = 20.

The answer to this will be 20

the sum of 45% of a number and 55% of the same number is 200. what is the number?

Answers


.45x+.55x=200
Combine like terms
1x=200
So x is 100

Or you can do 45%+55%=100%
And 100% of 200 is 200

3/4 times what equals 9/8?

Answers

Answer:

I believe the answer to this question is: 3/2 simplified to 1  1/2.

Which of the following is the solution to the equation 2/3 over 3x = 12?
x=4
x=8
x=18
x=24

Answers

Answer:

x = 54 and none of the alternatives given is correct

Step-by-step explanation:

Let's solve for x in the equation given, this way:

2/3 ÷ 3x = 12

2/3 * x/3 = 12

2x/9 = 12

2x = 108

x = 108/2 = 54

Proof of x = 54

2/3 * 54/3 = 108/9 = 12

x = 54 and none of the alternatives given is correct

What is the equation of a line that contains the following two points?
20 points


(3,-1) , (4,4)



A) y = -5x + 8


B) y = 3x + 5


C) y = 5x -16


D) y = -3x + 6

Answers

Answer:

the equation that contains the following 2 points is y=5x-16 which is C.

if The price tag on a trumpet says 104 how much did the store pay for it

Answers

Without the markup percentage or discount percentage, it is impossible to calculate the actual cost price the store paid for the trumpet. One needs this additional information to provide a precise answer.

The question "if the price tag on a trumpet says $104, how much did the store pay for it" cannot be answered with the information provided. To calculate how much the store paid for the trumpet, we need additional details such as the markup percentage or the discount percentage. Retail stores typically apply a markup to the cost of the goods they purchase from suppliers to cover their operating expenses and make a profit.

Let's assume the markup percentage is known. For example, if a store generally marks up items by 50%, and the selling price of the trumpet is $104, we can calculate the store's cost using the formula: Cost Price = Selling Price / (1 + Markup Percentage). So the cost would be $104 / (1 + 0.50), which is $69.33.

Without the markup or discount information, it is impossible to determine the exact cost price that the store paid for the trumpet.

5 x 680 using distributive property

Answers

I believe it would be (5 x 600)+(5x80) = 3400

Convert 2671(in base 9), to base 3 without first converting to base 10.​

Answers

Since 9 is 3², each digit in base nine takes two digits in base 3.

2₉ = 02₃

6₉ = 20₃

7₉ = 21₃

1₉ = 01₃

Putting it together

2671₉ = 2202101₃

if everything costs $25.30 and there is an 8% meals tax, how much does the meal cost ?

Answers

Answer:

Total cost of the meal is $ 27.32.

Step-by-step explanation:

Given:

Cost of the meal = $25.30

Tax levied on it = 8%

We have to find the total cost.

Total cost of the meal = Summation of cost of the meal and levied tax.

So,

We have to calculate the tax.

⇒ [tex]8\%\ of\ \$25.30[/tex]

⇒ [tex]\frac{8}{100}\times \$25.30[/tex]

⇒ [tex]0.08\times \$25.30[/tex]

⇒ [tex]\$2.024[/tex]

Tax imposed = [tex]\$2.024[/tex]

Now,

Total cost of the meal =Tax + Meal cost

⇒ [tex]\$(2.024+25.30)[/tex]

⇒ [tex]\$27.324[/tex]

Total cost of the meal is $ 27.32.

what is 5x to the third times 6

Answers

Answer:

The answer is that 5x to the third times 6 is 30x³

Step-by-step explanation:

Let's answer the question, this way:

5x to the third = 5x³

5x³ times 6 = 5x³ * 6 = 30x³

The answer is that 5x to the third times 6 is 30x³

what’s the slope of -1,-10 and -1,-2

Answers

Answer:

slope = undefined

Step-by-step explanation:

for two points (x1,y1) (x2, y2)

slope, m = (y2 - y1)/(x2 - x1)

so, for (-1,-10) (-1,-2)

slope = (-2 - (-10))/(-1 -(-1)) = 8/0

slope = undefined

2 fields are 1,200 meters from each other. On a map the 2 fields are 8 centimeters apart. What scale is the map using.

Answers

Answer:

The scale 150 metres : 1 centimeters is the map using.

Step-by-step explanation:

Given:

2 fields are 1,200 meters from each other.

On a map the 2 fields are 8 centimeters apart.

Now, to find the scale map is using.

Actual distance between the 2 fields = 1200 meters.

Distance in the map between the 2 fields = 8 centimeters.

So, to get the scale map is using we find the ratio:

[tex]Actual\ distance\ between\ the\ 2 fields/ Distance\ in\ the\ map\ between\ the\ 2 fields[/tex].

[tex]=\frac{1200}{8}[/tex]

[tex]=\frac{150}{1}[/tex]

[tex]=150\ meters:1\ centimeters[/tex]

Therefore, the scale 150 metres : 1 centimeters is the map using.

Jerry collected 45000. Kramer collected 5 times more than jerry. Elaine collected 9 times less than jerry. Newman collects the same as jerry. Kramer and Elaine collected together. How much have the collectors each collected

Answers

Kramer collected = 225000

Elaine collected   = 5000

Newman collected = 45000

Solution:

Given Jerry collected 45000.

Kramer collected = 5 times more than Jerry collected

                             = 45000 × 5

                             = 225000

Kramer collected = 225000

Elaine collected   = 9 times less than Jerry collected

                             = 45000 ÷ 9

                             = 5000

Elaine collected   = 5000

Newman collected = same as Jerry collected

                                = 45000

Newman collected = 45000

Hence, Kramer collected = 225000

Elaine collected   = 5000

Newman collected = 45000

Answer:

2025000 kramers collected

Step-by-step explanation:

!HELP!

Look at the figure below:

*look at image attached*

Make a two-column proof showing statements and reasons to prove that triangle ABD is similar to triangle ACB.

(please show in a two-column proof)

Answers

I hope this help you with what you need

ABC has vertices at A(5,-1), B(9, -9), and C(4,-1). Write the equation of the line in slope-intercept form that is perpendicular to AB and passes through point C

Answers

Answer:

[tex]y=\frac{1}{2}x-3[/tex]

Step-by-step explanation:

step 1

Find the slope of AB

we know that

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

[tex]m=\frac{y2-y1}{x2-x1}[/tex]

we have

A(5,-1), B(9, -9)

substitute the values

[tex]m=\frac{-9+1}{9-5}[/tex]

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

[tex]m=-2[/tex]

step 2

Find the slope of the line that is perpendicular to AB

we know that

If two lines are perpendicular, their their slopes are opposite reciprocal (the product of their slopes is equal to -1)

we have

[tex]m_A_B=-2[/tex]

therefore

The slope of the perpendicular line is

[tex]m=\frac{1}{2}[/tex]

step 3

Find the equation of the line in point slope form

[tex]y-y1=m(x-x1)[/tex]

we have

[tex]m=\frac{1}{2}[/tex]

[tex]C(4,-1)[/tex]

substitute

[tex]y+1=\frac{1}{2}(x-4)[/tex]

step 4

Convert to slope intercept form

Isolate the variable y

[tex]y+1=\frac{1}{2}x-2\\\\y=\frac{1}{2}x-2-1\\\\y=\frac{1}{2}x-3[/tex]

What is 2 3/4 * 2 1/2

Answers

Answer:

6.875

Step-by-step explanation:

Used a calculator to solve this one, it might be incorrect, i suggest doing some extra research on how to solve to see if you get this answer ;)

Ninety-eight percent of the mules who were surveyed said that stubbornness was a good character trait. If 343 mules gave this response, how many were surveyed in total?

Answers

Answer:

350 people

Step-by-step explanation:

you would cross multiply

98/100 times 343/x

98x = 34300

34300/98= 350

So the answer is 350 people

A customer/member owes $11.02 and pays $100.00 in cash. The change due is $88.98. Provide the amount owed using the smallest number of bills and coins possible.

Answers

Answer: subtract

Step-by-step explanation: you’ll see

Final answer:

The smallest number of bills and coins to make up $88.98 is: 4 $20, 1 $5, 3 $1, 3 quarters, 2 dimes, 3 pennies.

Explanation:

The change due back to the customer is $88.98. The smallest number of bills and coins that equals this amount can be broken down as follows:

Four $20 bills, giving us $80.00,One $5 bill, adding $5.00, making the total now $85.00,Three $1 bills, adding $3.00, making the total now $88.00,Three quarters (25 cents), adding $0.75, making the total $88.75,Two dimes (10 cents), adding $0.20, puts the total at $88.95,Lastly, three pennies (1 cent), adding $0.03, gives the final total of $88.98.

So, the smallest amount of bills and coins possible to make up $88.98 is: 4 $20, 1 $5, 3 $1, 3 quarters, 2 dimes, 3 pennies.

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Drag numbers to show which are closest to ‐3/4 and ‐1/2 on the number line. -0.65 -1/3 -7/8 -3/5

Answers

Answer:

for -3/4 it is -0.65 and for -1/2 it is -3/5

Step-by-step explanation:

Final answer:

The numbers closest to -3/4 (-0.75) and -1/2 (-0.5) on the number line are -0.65 and -0.6 (or -3/5), respectively.

Explanation:

The question involves identifying which numbers on a list are closest to -3/4 and -1/2 on the number line. To do this, we should consider converting all the fractions and decimals to a common format (decimals) to easily compare their distances to -3/4 (which is -0.75 as a decimal) and -1/2 (which is -0.5 as a decimal).

The numbers provided are:

-0.65

-1/3 (which is approximately -0.333 as a decimal)

-7/8 (which is -0.875 as a decimal)

-3/5 (which is -0.6 as a decimal)

Now, to determine which numbers are closest to -3/4 and -1/2:

For -3/4 (-0.75), the closest number is -0.65.

For -1/2 (-0.5), the closest number is -0.6 (or -3/5).

Show that x+2​ is a factor of f(x)=x^4+2x^3−27x−54​ . Then factor f(x) completely.
f(x)=

Answers

Answer:

Step-by-step explanation:

Final answer:

The polynomial f(x)=x^4+2x^3−27x−54 has x+2 as a factor. The complete factorization of f(x) after polynomial division and analysis is (x + 2)(x^2 - 3x + 9)(x + 3).

Explanation:

To show that x+2 is a factor of f(x)=x^4+2x^3−27x−54, we need to use the Factor theorem which states that if a polynomial f(x) has a factor of the form x - k, then f(k) = 0.

So, if x + 2 is a factor of the function, then f(-2) should equal 0. Let's apply this to our function:

f(-2) = (-2)^4 + 2(-2)^3 - 27(-2) -54 = 16 -16+54 -54 = 0. So x+2 is indeed a factor.

To factor f(x) completely, we will perform polynomial division of f(x) by the factor (x+2) which will give us g(x) = x^3 - 27. This can be further factored to x^3 - 3^3 which is a difference of cubes. Consequently, the complete factorization of f(x) would be:

f(x) = (x + 2)(x^2 - 3x + 9)(x + 3).

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Which segments are congruent?

Answers

PLEASE MARK BRAINLIEST!

Answer:

The two congruent segments are EF and GF, and EH and GH.

Step-by-step explanation:

That being said, your answer is A because EF and GF are in fact congruent segments.

I hope this helps!

- sincerelynini

Danielle and her friends put their money together to buy a book of tickets for the fair that contains 50
tickets. She and her two friends each paid $5.00. What is the price per ticket?!

Answers

Step-by-step explanation:

There are 3 people in total, Danielle and w of her friends. Since they paid $5 each they paid $15 in total for the 50 tickets. To find the price per ticket simply divide the total paid by the amount of tickets.

Price per ticket = 15.0÷50 = $0.30

Answer: Each ticket cost 0,3$

Step-by-step:

You have to divide 15 by 50 (15/50)

In this way you get the answer really quickly.

Hope I helped you!

Anyone knows what the slope of this is?

Answers

Answer:

The slope is 0

Step-by-step explanation:

This is a horizontal line, and all horizontal lines have a slope of 0.

(to see why, just pick any two points, and work out the change in x over the change in y. i.e. rise/run.  Since the y coordinates are all equal to 2, the numerator will be 2 -2, meaning the fraction is 0).

The slope is 0. This is because the line is horizontal. Any horizontal line has a slope of 0. Please tell me if you understand! I hope this helps!

Which composition of similarity transformations would
map polygon ABDC to polygon A'B'D'O'?
a dilation with a scale factor greater than 1 and then
a translation
a dilation with a scale factor greater than 1 and then
a rotation
a dilation with a scale factor less than 1 and then a
reflection
a dilation with a scale factor less than 1 and then a
transation​

Answers

Answer:

A dilation with a scale factor greater than 1 and then a translation.

Answer:

A

Step-by-step explanation:

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