Ahardware store paid $87.50 for a lawn mower and then sold it for $159.95 what was the gross profit

Use the graph of the sine function y=2sinθ shown below

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18