Question

Which of the following ordered pairs is not a solution to the inequality y < -x + 4?

(1, 2)

(2, 1)

(4, 0)

(3, -2)

Answer 1

Insert each ordered pair in the given inequality, and see which one does not work.
For example, the first choice is (1, 2), and the inequality is y < -x + 4
Insert 1 for x and 2 for y:
Is 2 < -(1) + 4?
Is 2 < 3?
The answer is yes, so the first choice works.

Now try choices 2, 3, and 4 in a similar way and see which one does not work.

Answer 2

(2, 1)

Answer 3

Try (2, 1)
y < -x + 4
2 < -(1) + 4 True or false?

Answer 4

True

Answer 5

?

Answer 6

3rd one is not a solution because
0<-4+4
0<0
which is false

Answer 7

rest are true

Answer 8

so (1, 2)

Answer 9

@nitz

Answer 10

(1,2) is a solution as
2<-1+4
2<4-1
2<3 which is true

Answer 11

fine...?