11) Jeff owns a watch repair shop. He has found that the

Last updated: 7/19/2022

11) Jeff owns a watch repair shop. He has found that the cost of operating his shop is given by C (x) = 2x² - 108x+87, where C(x) is the cost and x is the number of watches repaired. How many watches x must he repair to have the lowest cost? 12) Ella works at Wendy's. On Monday she sells 15 fries and 10 burgers totaling $65.00. On Tuesday she sells 30 fries and 5 burgers totaling $77.50. How much does each burger cost?