Question

How many solutions does the system have?

y = -7x + 8

y = -7x - 8
Choose 1 answer:

Answer 1

No solutions got it right on Khan.

Explanation:

Answer 2

No solutions

Explanation:

If we try to solve this system for y at x = 1, we get an impossible situation:

`y=-7(1)+8=-7+8=1\\y=-7(1)-8=-7-8=-15\\1=-15`

Clearly, 1 ≠ -15, and we'll see that any value of x that we pick gives us two contradictory values for y, so this system has no solutions.