First take 400 and divide it by 2.5 to find the hourly rate. Then divide 600 by the hourly rate (160) to get 3.75 hours. My work is listed below.
The answer is 100 I’m sure
To do this, multiply 3/4 by 1/2 and you end up with 3/8 lb. or 0.375 lb.
X-8+y^2=52 is the answer I believe