Answer:
2.4 math problems.
Step-by-step explanation:
3 math problems in 1 hour and 15 minutes.
Divide by 5. 3/5= 0.6
0.6 problems in 15 minutes.
2.4 problems in 1 hour.
How many math problems in one hour?
0.6 • 4= 2.4.
-2x=30-120
-2x = -90
=x = -90/-2
=x = +45
