What is the coefficant of x^3 y^2 in the expansion of (2x+y)^5

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)