To solve -3 = -19 + b 5 what step would you use

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

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.

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.