Lucinda ran 3.7 miles in 30 minutes. What was her average time for each mile?

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x