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1 vote
Which of these expressions is equivalent to 30b2?

A 3b + 10b

B 3b. 10b

c9b +21b

D 9b21b

User Andrew Fox
by
8.5k points

1 Answer

6 votes

Answer:

b

Explanation:

A. you can just sum the two terms containing a "b"

3b + 10b = 13b

B. can be writen like 3 × b × 10 × b

3b. 10b = 3×b×10×b = 30×b×b = 30b²

c. same as in A.

9b +21b = 30b

D. is any of those numbers a power? if not, it's the same as in B.

9b21b = 9×b×21×b = 189b²

User Sergeyne
by
7.6k points

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