Dave has $11 to spend on a $6 book and two birthday cards (c) for his friends. how much can he spend on each card if he buys the same card for each friend?

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

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?