PLS HELP Classify the relations according to whether or not they are functions.

x = -3
y = 10
3x + 2x= 3

This is fractions casey shared a pizza with some friends.they each ate 1 third of the pizza. how many people shared the pizza

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar