Over the course of a year, a tractor trailer commutes 160,000 miles across america.
a. assuming a trucker changes his tires every 40,000 miles, and that he starts with a brand new set of tires, how many sets of tires will he use in a year?
b. if the trucker changes the oil every 10,000 miles, and he starts the year with a fresh oil change, how many times will he change the oil in a year?

a. 5 sets of tires

b. 16 times

Step-by-step explanation:

total distance commuted by the truck = 160,000 miles

a.tires of the truck are changed after every 40,000 miles

40,000 to 80,000 to 120,000 to 160,000 he will change his tires four times assuming he started his journey with the new tires. so, he needs uses a total of 5 sets of tires for the whole journey.

b. changes oil every 10,000 miles then to travel 160,000 miles

=

= 16 times in whole journey

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x