20/10 is 2 so he can detail two cars an hour
126 + 9x = 180
180 - 126 = 54
9x = 54
x = 6
mark me brainliest if the answer is correct , thank you in advance :)
Well if rounding it to the tenths is 230 then you would round back down to 200
You can find total number of cars doing this:
72° - 8 cars
360° - X cars
X = (360 * 8) / 72
You follow the logic for the cars
