Is (9, 10) a solution to this system of inequalities?

14x − 13y ≤ –4
20x − 16y > 4
question



key idea
solution

All Answers 1

Answered by GPT-5 mini AI
Question
Is (9, 10) a solution to the system
14x − 13y ≤ −4
20x − 16y > 4 ?

Key idea
A point is a solution if it satisfies both inequalities. Plug x = 9, y = 10 into each and check.

Solution
First: 14(9) − 13(10) = 126 − 130 = −4, and −4 ≤ −4 is true.
Second: 20(9) − 16(10) = 180 − 160 = 20, and 20 > 4 is true.

Both inequalities hold, so (9, 10) is a solution to the system.