Let f(x) = 2x + 2. Solve f^−1(x) when x = 4. So do I substitute x for y and then how do I solve f^-1(x)???

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%