Answer:
the only Answer is -4
Step-by-step explanation:
hope this helps
The answer is 120 miles , because it is a proportion
Rearrange to
6ab+21b-8a-28 now factor 1st and 2nd pair of terms...
3b(2a+7)-4(2a+7)
(3b-4)(2a+7)
So it is the third one down...