Question

Which numbers are solutions to the inequality x < −7, using the replacement set {−15, −10.5, −7.2, −7, 0}?

Choose all answers that are correct.

A.
–7

B.
−7.2

C.
−10.5

D.
−15

Answer 1

-15<-10.5<-7.2<-7(<0)

x∈{-15, -10.5, -7.2}. These are less than -7

Answer: B, C, D

Answer 2

Find all the number in the set that are less than -7.

The 'bigger' the negative number seems, the smaller it is.

So -15, -10.5, and -7.2 are all less than -7.