At a pizza restaurant, it costs $4.00 to make a small pizza that sells for $12, and it costs $6.00 to make a large pizza that sells for $15. In one week, the restaurant spent a total of $1100 making the pizza and earned $2910 selling the pizza. How many small and large pizzas each were sold?

Which of the following can be used to explain a statement in a geometric proof?

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.