JoAnn paid $3.80 for each book at a book sale.
How much did she spend if she bought 9 books?

Josephine has a great garden with and area of 2x2 + x - 6 square feet

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Find the slope of the line passing through a pair of points