Question

Select all possible values for x if −3x < 15. Select one or more: A. -11 B. -7 C. -5 D. 2 E. 9

Answer 1

D and C

Explanation:

Since a negative times a negative is a positive, the only possible values (of the ones listed) for x are positive values that are equal to or higher than 15, and are not correct. Since a positive times a negative is a negative, the two positive answer choices, 2 and 9 are both correct.

Answer 2

-3 x -11 = 33
-3 x -7 = 21
-3 x -5 = 15
-3 x 2 = -6
-3 x 9= -27

the sign < means smaller than.
-6 and -27 are smaller than -15.

This means that the answer is D & E