Answer:
4
Step-by-step explanation:
the answer is 4 because 2 people studied 4 hours, 1 person studied 4.5 hours and one person studied 8.5 (they are insane) which would total to 4 people studying for at least 4 hours.
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Check the picture below.
x=1/4
1/4+3/4=1 whole
Add to both sides:
Subtract 2 from both sides:
Divide both side by 2:
x= -15/4 => x= -3 3/4 or x= -3.75