Question

The point (-2, -1) satisfies which of the following inequalities?

1.)2x + 5y - 1 > 0
2.)-2x + 5y - 1 > 0
3.)5x - 2y + 1 > 0
4.)-5x + 2y + 1 > 0

Answer 1

Answer:Answer:

4.)-5x + 2y + 1 > 0

Explanation:

Substitute -2 for x and -1 for y in each inequality and see if true↓

2(-2)+5(-1)>0 → -9>0 FALSE

-2(-2)+5(-1)>0 → -1>0 FALSE

5(-2)-2(-1)>0 → -8>0 FALSE

-5(-2)+2(-1)+1>0 → 9>0 TRUE

Answer 2

4.)-5x + 2y + 1 > 0

Explanation:

• Substitute -2 for x and -1 for y in each inequality and see if true↓

1. 2(-2)+5(-1)>0 → -9>0 FALSE
2. -2(-2)+5(-1)>0 → -1>0 FALSE
3. 5(-2)-2(-1)>0 → -8>0 FALSE
4. -5(-2)+2(-1)+1>0 → 9>0 TRUE