Simplify this expression.
17 - 12x - 18 - 5x

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?

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Find the commission on a $590.00 sale if the commission is 15%.