Atraveler drove 150 miles at 50 miles per hour and then 160 miles at 40 miles per hours .hiw many hours did the driver take altogether

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor