Tara buys two items that cost d dollars each. She gives the cashier $20. Which expression represents the change she should receive? A. 20 - 2d
B. 20 - d
C. 20 + 2d
D. 2d - 20

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12