If using the method of completing the square to solve the quadratic equation 22 + 3x + 9 = 0, which number would have to be added to "complete the square"?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Using the information in the customer order, determine the length and width of the garden. enter the dimensions. length: feet width: feet

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)