Answer:
(a) The product of the sum of a and b and their difference.

(b) The tripled product of 6a and b².

(c) The difference of the squares of 2m and 7n.

Speed = distance / time
7 = 17.5 / t
t = 17.5 / 7
= 2.5 minutes
Answer: A,C,E
Step-by-step explanation:
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