Write two equations whose graph intersect at the origin (0,0)

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll