9. A 100 kg mixture of two different types of nuts costs $550. If type A costs $4 per kg and type B costs $7 per kg, how many kg of each type were used?

Which of the following is correct interpretation of the expression -4+13

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 area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.