1-9. Simplify each expression.

a. 42 + (-17)

b. 8-(-9)

c. 8(-9)

d. -42=(-7)

e.-2(-3)(-4)

f. -18-7

g. (-5)2

h. -52

i. 49

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?

Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?