Which of the following is a quadratic function ?
a. y=(x+2)(2x-3)
b. y=(3x-4)
c. y= 1/x^2
d. y=x(x-4)(x+3)

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

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12