SO it tells me the answer but can you just explain the process step by step?

In trapezoid bath, ah=19.7 and et=16.1. identify be.

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss