Question

1.

y = 4x - 7
4x + 2y = -2

• show your work
• correct X and y

2.
4x^2 + 3 = 39
• show your work
• correct answers

Answer 1

1)

x = 1

y = -3

2)

x = 3 or x = -3

Explanation:

1)

System of equations, we plug in y to the second equation

`4x + 2(4x-7) = -2\\4x+8x-14 = -2\\12x = 12\\x=1`

We then plug x back into the first equation to find y

`y = 4(1) -7\\y = -3`

2)

`4x^2 +3=39\\4x^2=36\\x^2=9\\x=3, -3`