This looks like common core which is never straight forward.It seems as though they are asking for the perimeter and not area,since they used feet for the distance around instead of sq.ft.
Mary = M Chris = C
M = 3C-4
M-3=C+9 --> M=C+12
3C-4=C+12
2C=16
C=8
M=3C-4 --> C=8
M=3(8)-4
M=24-4
M=20
Mary is 20, and Chris is 8
Ratio
if 13.3:9.5=2.52:1.8 then they ar similar
we do
13.3/9.5=2.52/1.8?
1.4/1=1.4/1
ratio is 1.4:1 or invert 1:1.4
answer is 2nd choice
yes; 1:1.4
Hello,
There are 24 hours in a day. If 25% of your day is spent at school, then you spent (24)(0.25) = 6 hours at school.
If 8% of your day is spent eating, then you spent (24)(0.08) = 1.92 hours eating.
Together, this is 6 + 1.92 = 7.92 hours ≈ 7.9 hours spent at school and eating in one day.
Hope this helps!
