Use the diagram at the right. For what values of X and Y must EFGH be a parallelogram?

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Which of the following is a proper fraction? a. 9⁄8 b. 5⁄6 c. 7⁄3 d. 4⁄2

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?