Solve the simultaneous equation y=2x+13 and y=x^2-7x+3

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

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Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.