I believe it is 13/60
First, you would make them have common denominators
4/5 (12/12) is 48/60
7/12 (5/55 is 35/60
Second, you want to find the difference
48-35=13
So from that, I would assume that the difference between the two is 13/60
In order to find the answer you multiply 1360 by .15 and you get the answer of 204. So 204 students are absent.
I believe that it is 45 degrees. i could be wrong, so make sure to check!
Y=2x
3x+2y=21
3x+2(2x)=21
3x+4x=21
7x=21
x=3
y=2(3)
y=6
