Susan is buying uniform shirts that cost $12 each. She has $50 total to spend. She also has a coupon for $10 off her purchase. Assuming there is no tax, how many shirts (s) can she buy?

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?