Question

Which of the following ordered pairs satisfied the inequality 5x-2y<8

A) (-1,1)
B) (-3,4)
C) (4,0)
D) (-2,3)

Answer 1

Answer: A, B, and D

Explanation:

Input the coordinates into the inequality to see which makes a true statement:

5x - 2y < 8

A) x = -1, y = 1 5(-1) - 2(1) < 8

-5 - 2 < 8

-7 < 8 TRUE!

B) x = -3, y = 4 5(-3) - 2(4) < 8

-15 - 8 < 8

-23 < 8 TRUE!

C) x = 4, y = 0 5(4) - 2(0) < 8

20 - 0 < 8

20 < 8 False

D) x = -2, y = 3 5(-2) - 2(3) < 8

-10 - 6 < 8

-16 < 8 TRUE!