of the 800 participants in a marathon 120 are running to raise money for a cause how many participants out of 100 are running for a cause

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?