Could anyone talk to me I'm sad pls don't just anwaser for the points

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

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