An airplane travels 645 miles in 3 hours at a constant speed. How much time will it take traveling 1,075 miles?

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  5 hours

Step-by-step explanation:

Time is proportional to distance:

  t/1075 = 3/645

  t = 1075(3/645) = 5

It will take 5 hours to travel 1075 miles at that rate.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x