Inverse relations and functions
Let f(x) = 2x + 5. Find the following.
help pls if you know.

In factoring by grouping, what would you have for step 3 for the following? step 1: x^3 +5x^2 +4x+20 step 2: x^2 (x+5)+4(x+5) step 3: ?

What is the slope of a line that is perpendicular to y = 3x + 1

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