Ming's team cleans 3 animals per hour after an oil spill. Nina's team cleans 6 animals per hour. How
much longer does it take Ming's team to clean
12 animals?

What are “like terms”? why can we only add like terms?

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.