Answer:
b = 3.1
Step-by-step explanation:
Since the length of one of the longer sides, a, has been given to be 6.3, plug it into the equation.
2(6.3) + b = 15.7
12.6 + b = 15.7
b = 15.7 - 12.6
Answer:
2.25
Step-by-step explanation:

Is that the exact question? because the last part doesn't really make sense to me
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Step-by-step explanation:
the answer is in the above image
$15.69 is the answer
Subtract 2.50 from 49.57 and then divide your answer by 3