Hector is buying books at a bookstore. *He buys 2 used books and 1 new book for $26.
*The new book costs $18.
If each used book cost the same amount, what is the price of each used book?

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?

Having a hard time understanding this question (see attachment).

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?