In the figure below, Z is the center of the circle. Suppose that QR= 13, SR= 3x+1 ,ZU=6 , and ZV=6 . Find the following.

How is working backward similar to solving an equation?

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0

Which expression can be used to find the cost of .75 kilogram of cheese at the price of $6.40 per kilogram?