A saleswoman earns 20% commission on all the merchandise that she sells. Last month she sold $400 worth of merchandise. How much commission (in dollars) did she earn last month​

What is the inverse of the function f(x) = 2x + 1?

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?