Mathematics Middle School

Solve the linear system using substitution. Show your work.
y = -3x + 3
4x +3y = -1

Answers

Answer 1
Sub y in the second equation by y in the first equation:
We get 4x+3(-3x+3)=-1
4x-9x+9=-1
-5x=-10
x=2
Sub in the first equation
y=-3(2)+3
y=-3
Answer 2

Answer:

x=2 and y=-3

Step-by-step explanation:

y=-3x+3, 4x+3y=-1 solve using substitution

y=-3x+3 solve y=-3x+3 for y

4x+3y=-1

4x+3(-3x+3)=-1 simplify both sides of the equation

-5x+9=-1

-5x+9-9=-1+-9 add -9 to both sides

-5x=-10

-5x/5=-10/-5 divide both sides by -5

x=2

substitute 2 for x in y=-3x+3

y=(-3)(2)+3

y=-3 simplify both sides of the equation

answer; x=2 and y=-3

Related Questions

Two-ninths of the students in sixth grade are eleven years old. If there are s students in sixth grade, write an expression for the number of students that are eleven years old in terms of x.

Answers

Answer:

2/9 ⋅ x

Step-by-step explanation:

Answer:

How many sixth graders are there if the school has 90 students?  If the school has x students, write an expression for the number of sixth graders in terms of x or 2/9

Step-by-step explanation:

A local gym sells monthly memberships. The function f(x) = −x2 + 18x − 72 models the daily profit in dollars, where x is the number of memberships sold.

Determine the zeros, and explain what these values mean in the context of the problem.

x = 9, x = 18; The zeros represent the number of monthly memberships that produces a maximum profit.
x = 9, x = 18; The zeros represent the number of monthly memberships where no profit is made.
x = 6, x = 12; The zeros represent the number of monthly memberships that produces a maximum profit.
x = 6, x = 12; The zeros represent the number of monthly memberships where no profit is made.

Answers

Answer:  C.) x = 6, x = 12; The zeros represent the number of monthly memberships that produces a maximum profit. Is not the answer

Step-by-step explanation: I took the test and got it wrong. I don't know what the answer is.

x = 6, x = 12; The zeros represent the number of monthly memberships that produce a maximum profit. The correct option is C.

What is a quadratic equation?

It is a polynomial with a degree of 2 or the maximum power of the variable is 2 in quadratic equations. It has two solutions as its maximum power is 2.

Given that a local gym sells monthly memberships. The function f(x) = −x² + 18x − 72 models the daily profit in dollars.

The given quadratic equation is solved by equating the function to zero:-

−x² + 18x − 72 = 0

x² - 18x + 72 = 0

x² - 12x -6x + 72 = 0

x ( x -12 ) -6 ( x -12 )= 0

( x - 12 ) ( x - 6 ) =0

x = 12, 6

Therefore, x = 6, x = 12; The zeros represent the number of monthly memberships that produce a maximum profit. The correct option is C.

To know more about quadratic equations follow

https://brainly.com/question/1214333

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I will give brainlest please answer and explain

Answers

Answer:

A and C

Step-by-step explanation:

will give brainliest plz help me


To find the distance an object has traveled, you use the formula D=RT; where D=distance, R=rate and T=time. Find how far a person drove if he traveled at a rate of 60 miles per hour for 6 hours.

A. 10 miles
B. 36 miles
C. 360 miles
D. 100 miles

Answers

The answer is C because if it’s 6 hour then u multiple that by 60 and you will get 360

Answer:

C-  you are correct I just know it!  but it would be very helpful if you could at least give me 4 stars ; )

Step-by-step explanation:

Plz help me thank you

Answers

Answer:

C

Step-by-step explanation:

I think the answer is c

The figure below is made of 2 rectangular prisms.
What is the volume of this figure?
8 in
2 in
9 in
5 in
1 in
cubic in
Hello please help me here is the shape of you need to see it visually

Answers

Answer:

2in

Step-by-step explanation:

Your answer would be 2 in

Find x. Please help!

Answers

Answer:

180° - 36° = 144 ÷ 2 = 72°

I'm sorry if I'm wrong

I'm from Indonesia, I love United States.

Based on the resolution, summarize the story’s message about what it means to be a hero.

Answers

Heroes never give up in the battle against evil, and they aren’t afraid to ask others for help.

Quick need the answer.Please ​

Answers

Answer:

B

Step-by-step explanation:

Which value of x is a solution of the inequality?

x−(−3)≥7


Question 3 options:

x=−5

x=2

x=3.5

x=8

Answers

I think it’s negative five -5

What are the solutions to the system of equations graphed below?

Answers

A solution to system of equations is where the lines intersect. Do it would be (-1,5) and (3,-3)

Which of the following is the graph of a function x?

Answers

The last one that looks like a V
yes should be the last one like the person said above! i did this before :)

Help Please

Proportion word problem:

Answers

Answer:

TOO small

Step-by-step explanation:

Answer:

I think 80ml cause 240 divided by 3ml equals 80ml

evaluate (will give brainliest)

Answers

Answer:

Step-by-step explanation:

1. X/2 when x = 1/2

Putting value of x in the equation

1/2 /2 = 0.25

2. 2x2 - 8 when x = 3

2(3)2 - 8

= 2(9) - 8

= 18 - 8 = 10

3. 4(x - 7)3 + 5 when x = 9

4 (x3 - 21x2 + 147x - 343) + 5

Putting value of x

4((9)3 - 21(9)2 + 147(9) - 343) + 5

4(729 - 1701 + 1323 - 343) + 5

4(8) + 5

= 32 + 5 = 37

Answer:

1. 0.25

2. 208

3. 517

Step-by-step explanation:

Number 1.

0.5/2

= 0.25

number 2.  

2(3)^3-8

6^3 - 8

216-8

= 208

Number 3.

4(9-7)^3 +5

4(2)^3+5

8^3+5

= 517

What were the dimensions of the slice defined as RSTU in Exercise 1?
Question 2 options:


10 cm by 18 cm


18 cm by 18 cm


11 cm by 18 cm


11 cm by 10 cm

Answers

Answer:

how can I tell u the answer which out a pic

Step-by-step explanation:

can you please tell me what the answers are for the brainliest

Answers

Answer:

1. 24

2. 11

3. 10

4. 76

5. 135

6. 34 is suppose to be p

7. 22 is suppose to be q

8.

First r=12

Second r=20

third r=32

fourth r=10

Step-by-step explanation:

5. Select the expression that is equivalent to: V + V + V + V.

Answers

Answer: B. 4V

Step-by-step explanation: You multiply the Vs by 4 due to how many there are.

Answer:

4V

Step-by-step explanation:

If you put x+x+x+x into a calculator, then you get a line that is equivalent to 4x. Other than that, I can't really explain that any more.

Hope that this helps!

The sides of a square-shaped room are 3 meters long. Wendy wants to buy carpet to cover the floor of the room. If the carpet costs $30.71 per square meter, how much will it cost to buy enough carpet for the room?

Answers

Answer:

276.39

Step-by-step explanation:

:)

92.13 because 30.71x3, 30x3=90 and 71x3=213 when 213 is converted it equals 2.13 there for 2.13+90=92.13

can someone pls help :(

Answers

Answer:

srry man i suck at civics, but i think it is B?

Step-by-step explanation:

What is the area of the parallelogram? (10 point)


a

1 over 25 square foot


b

11 over 25 square foot


c

3 over 25 square foot


d

4 over 25 square foot

Answers

The correct answer is a

Answer: A 1/25 square foot

Step-by-step explanation:

THERE YOU GOOOO. :))))))))))

Find the surface area of the prism or pyramid. Round to the nearest hundredth if necessary.

Answers

don’t press those links!!!

in recatangle ABCD AD=40 yards and CD=30 yards. find the area of the shaded region

Answers

There’s no “shaded region” so below it’s just the area value.

AD x CD = Area
40 x 30 = 1200
where is the shaded region?

help meeeeeeeeeeeeeeeeee BRAINLIEST

Answers

Answer:

put them in order

Step-by-step explanation:

Put in order from least to greatest meaning smallest number to biggest :)

Which represents this expression in simplest form?

15(x^2)^3
_________
25(x^−1)^−3

Answers

The first one . 15(x^2)^3
answer : the first one
hope this helps you out .

The diagram shows a track composed of a rectangle with a semicircle on each end. The area of the rectangle is 6,600 square meters. What is the perimeter of the​ track? Use 3.14 for pi

Answers

Answer:

The perimeter of the track is the two circumferences of the semicircles (when combined, they form one circle, so we can just find the circumference of the circle) added to the lengths of the rectangle (160 meters).

To find the circumference of the circle, we need to know the diameter.

Circumference of a circle: dπ or 2rπ, where d represents diameter and r represents radius

The diameter of the circle happens to be the same as the width of the rectangle. We know that the area of a rectangle is found by multiplying its length by its width. We know that the area is 14400 and that its length is 160.

Width: area divided by length

14400160=90

The diameter of the circle and the width of the rectangle is 90 meters.

Circumference:

90⋅π=90π→ If you are using an approximation such as 3.14 for π, multiply that by 90

Add 160⋅2 to the circumference since the lengths of the rectangle are also part of the perimeter.

160⋅2=320

90π+320

Answer link

Mr. Schmidt cuts 1/4 of a piece of construction paper. He uses 1/5 of the piece to make a flower. What fraction of the sheet of paper does he use to make the flower?

Answers

Answer:

4/20

I don't know fully if this is right.

Hope it helps.

What is the interquartile range for the set of data?

Answers

Answer:

35

Step-by-step explanation:

the line is at the 35 mark. i think if i'm wrong then i'm sorry

While fishing, Travis caught a bass that weighed 9.3 pounds and a trout that weighed 9 and 3/5 pounds. What was the combined weight of the two fish Travis caught?

If given links, I will report. If I receive the correct answer, I will give brainliest.

Answers

Answer

OK LES GOOO

1convert 9.3 to 9 1/3

2Convert both to same denominator: 9/15 plus 5/15

3so the answer is 18 14/15

Step-by-step explanation:

I need help ASAP because I need done before 4:00pm

Answers

Answer:

the 13th one is 115

Step-by-step explanation:

Please help, thank you!!

Answers

Answer:

Step-by-step explanation:

Givens

TriangleBase = 11  inchesHeight = 12 inches

Formula

A = Base * height / 2

Solution

Area = 11 * 12/2Area = 132 /2Area = 66 square inches.

Answer:

66

Step-by-step explanation:

Formula: bh1/2

Substitute: (11)(12)(1/2)

Solve: (11)(6)

66

(You could’ve also multiplied 11*12 first, gotten 132, then divided that by 2, also getting 66).

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