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Firlakuza [10]
2 years ago
11

PLEASE ANSWER QUICK!!

Mathematics
1 answer:
Citrus2011 [14]2 years ago
3 0

Answer:

A)  B is greater

B) when C = 21, A = 5 and B = 15

C) A must be 0, 5, or 12 for C to be greater than B

Step-by-step explanation:

A)  when a = -3, c = -20 and b = 4(-3)-5 so B = -17

B) when c = 21, a = 5 and b = 4(5)-5 so B = 15

C) C is greater than B when a = 0, 5, and 12

when a = 0, b = 4(0)-5 or -5

when a = 5, b = 4(5)-5 or 15

when a = 12, b = 4(12)-5 or 43

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3 years ago
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Ainat [17]

Answer:

Solution: x = -2; y = 3 or (-2, 3)

Step-by-step explanation:

<u>Equation 1:</u>  y = -5x - 7  

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Substitute the value of y in Equation 1 into the Equation 2:

-4x - 3(-5x - 7)  = -1

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Combine like terms:

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Subtract 21 from both sides:

11x + 21 - 21 =  - 1 - 21

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Divide both sides by 11 to solve for x:

11x/11 = -22/11

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Now that we have the value for x, substitute x = 2 into Equation 2 to solve for y:

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Subtract 8 from both sides:

8 - 8 - 3y = -1 - 8

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Divide both sides by -3 to solve for y:

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Therefore, the solution to the given systems of linear equations is:

x = -2; y = 3 or (-2, 3)

Please mark my answers as the Brainliest if you find this helpful :)

7 0
3 years ago
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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