Question

how did I travel if I went from nyc to Trenton a distance of 90 miles at 45 miles per hour how long did it take me

Answer 1

Answer: 2 hours

Mathematical Equation for this problem:

45x = 90                                                 

x = 2                                                Divide each side by 45.

Final Answer: 2 hours

Answer 2

Here, we must set up a proportion.

90/x = 45/1

Now, cross multiply.

90*1 = 45*x        Multiply each
90 = 45x            Our result. 

Now, divide 45 by both sides to isolate the variable.

45x/45 = 90/45       Divide by both sides. 
x = 90/45                Now divide
x = 2              x equals 2

Now that we know that x equals two, we also know how long it took him to drive. Add units to our answer. 

Final answer: It took us 2 hours