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Digiron [165]
3 years ago
13

Please help!!

Mathematics
1 answer:
Kryger [21]3 years ago
5 0
Switch y=2x+7 to 2x-y=-7 then multiply that equation by 2 to cancel out the y's. that ends up as 4x-2y=-14 which then you get x=-24. then you substitute x into one of the original equations y= 2(-24)+7 which equals y=-41
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What is the solution of the system of equations: -2x+8y=-8 and 5x-8y=20​
Tema [17]

Answer:

x=4 y=0

Step-by-step explanation:

You add the two equations together to get 3x=12. You derive x=4 and y=0 from that.

7 0
3 years ago
Can someone help me plead
andrew-mc [135]

Answer:

a. 2^3

b. 3^4

c. 4^3 × 5^2

d. 9^4 × 7^2

Step-by-step explanation:

The following equations are given

a. 2 × 2× 2

b. 3 × 3 × 3 × 3

c. 4 × 4 × 4 × 5 × 5

d. 9 × 7 × 9 × 9 × 7 × 9

We need to find the index notation for the above equations

a. 2^3

b. 3^4

c. 4^3 × 5^2

d. 9^4 × 7^2

In this way it should be done

The same would be relevant

4 0
3 years ago
A cylinder has a volume of 400 cubic feet. If the height of the cylinder is 25 feet, what is the radius of the cylinder? Use 3.
Lisa [10]

The radius of the cylinder will be  r=2.25ft

<h3>What will be the radius of the cylinder?</h3>

It is given that

Volume of the cylinder = 400 ft^{3}

height of the cylinder= 25 ft^{3}

Now we know that

Volume of the cylinder = \pi r^{2} h

putting values in the formula

400= \pi \times r^{2} \times25

r= \dfrac{4}{\sqrt{3.14} }

r=2.25 ft

Thus the radius of the cylinder will be  r=2.25ft

To learn more about the Volume of the cylinder follow

brainly.com/question/9554871

8 0
3 years ago
N - 6n simplified I NEED HELP
Vinil7 [7]

Answer:

-5n

Step-by-step explanation:

n-6n=-5n

Hope This Helps!!

(brainliest please, if possible)

8 0
3 years ago
Read 2 more answers
Does the point ( 2, 1 ) satisfy the equation y = 2x?
densk [106]

Answer:

No.

Step-by-step explanation:

Y=2x goes up twice and to the right once, it passes through the origin, therefore it won't touch or go pass by point (2,1)

6 0
3 years ago
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