What is the y-coordinate of the solution of the system of equations?{y=2x+14

−4x−y=4

Enter your answer in the box.

y =

Answers

Answer 1

Answer: Substitute 2x + 14 for y in -4x - y = 4:
-4x - (2x + 14) = 4
-4x - 2x - 14 = 4
-6x - 14 = 4
-6x = 18
x = -3
Substitute -3 for x in y = 2x + 14 and -4x - y = 4:
y = 2(-3) + 14 --> y = -6 + 14 --> y = 8
-4(-3) - y = 4 --> 12 - y = 4 --> -y = -8 --> y = 8
So y = 8

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Answers

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Steps:
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Please help with 2 Math questions. I dont really understand

Answers

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What are two square roots of 196

Answers

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How do I solve 4x + 3y=0 & 2x + y = -2 using substitution

Answers

4x + 3y = 0
2x + y = -2
take 2x and subtract to the side with -2
it'll look like this: y = -2x - 2
plug that equation in where the y is in the other equation.
it'll look like this: 4x + 3(-2x - 2)=0
which you multiply 3 and the -2x and the -2
which the equation would be: 4x - 6x - 6=0
put together like terms: -2x - 6=0
add the 6 to the side with the zero: -2x = 6
divide both sides by -2 which x= -3
to get y you plug in the answer for x (-3)
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so it'd then be -6 + y = -2
add the -6 to the side with -2
y= -2 +6
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