Use the discriminant to describe the roots of each equation. then select the best description.

x^2-5x+7=0

a.) double root
b.) real and rational roots
c.) real and irrational roots
d.) non-real roots

Which graph corresponds to the function f(x) = x2 + 4x – 1?

Consider the graph of the exponential function y=3(2)×

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.