Question

Witch expression is equivalent to 2.8k - 8.4?

A. 0.07 ( 4K -12 )
B. 0.7 ( 4K - 12)
C. 5.6K
D. -5.6K
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Answer 1

B

It can not be c or d because you can't combine unlike factors. It is not a because 0.07 * 4K is not 2.8K

Answer 2

The correct answer is B

We can simply solve to see if it is correct.

Apply the distributive property.

.7*4k-.7*12

2.8k-8.4

This matches the example given in the question.

Hope this helps!