A submarine descends 50 m every 5 minutes.
What is the rate of change?

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Is the figure congruent? yes or no?