A. 4/5 take the bus so 1/5 do not. 1/5 is 20% so 20% of the total students don't take the school bus.
B. The ratio of students who take the school bus to those who do not is 4:1
I think the answer is 5, if you divide 7.5 by 1.45 you get 5.2 or 5.17 so approximately 5.
Yint is where the line crosses the y axis or where x=0
set x=0
3y+4x=15
x=0
3y+4(0)=15
3y+0=15
3y=15
divide by 3
y=5
yint is (0,5) or at y=5
The circumference of the blue circle is about: 20 cm
The circumference of the orange circle is about: 10 cm