Composition of Functions — Unit test Answers

If u(x) = x5 – x4 + x2 and v(x) = –x2, which expression is equivalent to ?

If s(x) = 2 – x2 and t(x) = 3x, which value is equivalent to ?

Which will result in a difference of squares?

If and , what is the domain of ?

What is the sum of the polynomials?(7x3 – 4x2) + (2x3 – 4x2)

The revenue, in dollars, of a company that makes toy cars can be modeled by the polynomial 3x2 + 4x – 60. The cost, in dollars, of producing the toy cars can be modeled by 3x2 – x + 200. The number of toy cars sold is represented by x.

If a(x) = 2x - 4 and b(x) = x + 2, which of the following expressions produces a quadratic function?

If f(x) = 7 + 4x and , what is the value of ?

If f(x) = |x| + 9 and g(x) = –6, which describes the range of (f + g)(x)?

If a(x) = 3x + 1 and , what is the domain of ?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is ?

What is the product?

What is true about the sum of the two polynomials?6s2t – 2st24s2t – 3st2

If s(x) = x – 7 and t(x) = 4x2 – x + 3, which expression is equivalent to ?

Which is true about the degree of the sum and difference of the polynomials 3x5y – 2x3y4 – 7xy3 and –8x5y + 2x3y4 + xy3?