What is the value of r when S=0 for the equation
S= 22ttr^2 + 2ttrh for r?

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Write the expression 7x^3-28xy^2 as the product of 3 factors

What is the value of f(x) = 2.2 for f(-2)?