When x = 2.5 and y = 5, which of the expressions below will be greater than 75? Select all that apply. A) 8x+12y
B) 10xy
C) 4y^2–8x
D) y^3/2x

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

I’m stuck on this equation, anyone got the answer?