Tell whether x and y show direct variation. 2x=3y

Which of the following are accepted without proof in a logical system? check all that apply.

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16