Answer:

Step-by-step explanation:
Start with:

Combine like terms:

Answer:
i think the best estimate is answer b
Step-by-step explanation:
Answer:
B). 3 1/2(-2) = -7
Step-by-step explanation:
Let's evaluate the expression so as to be able to get the right estimate.
3 4/7 (-2 1/12)
=3 4/7 (-25/12)
= 25/7 * -25/12
= 25/7 * -25/12
= -625/84
= -7 37/84
Approximately it's equal to ,-7
15) 4m^2
17)9n^6
198a^2 (^ = power of)
the answer is 16 because .80 times 20 is 16