In 2006, the cost of mailing a letter first class in the United States was $0.39 for the first ounce and $0.24 for each additional ounce. Which expression shows the cost of mailing a 3-ounce letter in 2006?
O A. $0.39 + $0.24
OB. $0.39 + 2($0.24)
O c. 3($0.39 + $0.24)
OD. 3($0.39) + 2($0.24)

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Gail is making costumes for a school play. each rabbit costume needs one and one half yards of white fur fabric, a yard of blue striped fabric, and a quarter of a yard of pink felt for the ears. g? ail needs to make eight rabbit man yards will she need, for the white fur fabric, blue striped fabric, and pink felt?

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0