Question

the cost (in dollars)of making u cell phones is represented by C=20u+61. How many cell phones are made when the cost is $481

Answer 1

U=21

Explanation:

What they are asking for is U. They tell you that the cost is 481 so the C is 481

481=20u+61

You minus 61 from 481 which is 420.

420=20u

Then you divide 20 from 420 and you will get 21.