You can tell by using the time tables
You will need 2.75 cups hope this helps you
Let the distance of the first part of the race be x, and that of the second part, 15 - x, then
x/8 + (15 - x)/20 = 1.125
5x + 2(15 - x) = 40 x 1.125
5x + 30 - 2x = 45
3x = 45 - 30 = 15
x = 15/3 = 5
Therefore, the distance of the first part of the race is 5 miles and the time is 5/8 = 0.625 hours or 37.5 minutes
The distance of the second part of the race is 15 - 5 = 10 miles and the time is 1.125 - 0.625 = 0.5 hours or 30 minutes.
each of the sides of your equation
by the value of
on each of your sides
(you get this because we solve the particular equation we added above)
on each of your sides
because it equals to
because it brings us closer and closer to the answer of
by the number
on each of your sides