Tracy drove 312 miles in about 5 hours. what is the best underestimate of tracy's rate of speed?

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?