|15. aliyah runs approximately 5.4 miles per hour.
she is training for a half-marathon and plans
to run 9 miles on tuesday and 12 miles on
thursday. how many minutes longer will her
run be on thursday compared to tuesday?

33.33 minutes longer.

Step-by-step explanation :

We need to remember the following formula:

Where "t" is the time, "d" is the distance and "V" is the speed.

We know that she runs approximately 5.4 miles per hour, then:

Since she plans to run 9 miles on Tuesday, her run's time on Tuesday will be:

Making the conversion from hours to minutes, we get:

Since she plans to run 12 miles on Thursday, her run's time on that day will be:

Making the conversion from hours to minutes, we get:

Finally in order to find how many longer will her run be on Thursday compared to Tuesday, we need to make the following subtraction:

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x