Help i don't get this question

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?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Nikita wants to apply for student aid to fund her college education. arrange the steps involved in nikita’s application for financial aid