Question

Which ordered pair makes both inequalities true?

y < –x + 1

y > x

On a coordinate plane, 2 straight lines are shown. The first solid line has a negative slope and goes through (0, 1) and (1, 0). Everything below and to the left of the line is shaded. The second dashed line has a positive slope and goes through (negative 1, negative 1) and (1, 1). Everything above and to the left of the line is shaded.

Answer 1

Here SOLUTION: −5x + 4y = 20. 10x − 8y = −40.

Explanation:

First, solve the first equation for y. Then, substitute for y in the second equation. This equation is an identity.