You put all the numbers on one side of the equation and letters on another.
0.25r + 0.5r - r = 0.5 +0.125
-0.75r = 0.625 divide both sides by -0.75
r = -0.125
An exterior angle is equal to the sum of the 2 non adjacent angles. In this case
100 = x + 70 Subtract 70
x = 100 - 70
x = 30
1:10 or 100:1000 so the point is to just add one zero to each side and you'll get it right
Just distribute! its 2/15 - 9/25w
Answer:
C = 25.13cm
C = π d = π · 8 ≈ 25.13274cm
