Johnny had a math test and he started at 2:18 p. M. It took 75 minutes to complete the test. He had a dentist's appointment at 4:30 p. M. How much time, in minutes, did he have between the end of the test and his appointment time

57 minutes

Step-by-step explanation:

First, add 75 minutes to the time he started the test. Then, subtract the time you get from the time for his dentist appointment.

75 minutes is the same as 1 hour 15 minutes (1 hour = 60 minutes)

  H    M

  2   :  18

+  1   :  15

   3  :  33

He ended the test by 3:33 PM.

 H    M

 4  :  30

- 3  :  33

 0 :  57

Therefore, he had 57 minutes between the end of the test and his appointment.