Brianna's teacher asks her which of these three expressions are equivalent to each other.

Expression A:

9

x

-

3

x

-

4

Expression B:

12

x

-

4

Expression C:

5

x

+

x

-

4

Brianna says that all three expressions are equivalent because the value of each one is

-

4

when

x

=

0

.

Brianna's thinking is incorrect.

Question

Cherish Cole

18 October, 20:41

+5

Answers (1)

Know the Answer?

Gary Avery · Answer 1

Expression A and C are correct because 9x - 3x = 6x and 5x + x = 6x, then - 4

Brianna's teacher asks her which of these three expressions are equivalent to each other.Expression A:9x-3x-4Expression B:12x-4Expression C:5x+x-4Brianna says that all three expressions are equivalent because the value of each one is-4whenx=0.Brianna's thinking is incorrect.