Question 899254
rate for A alone 9
rate for A & B together 3.94
1/a+1/b=1/x
1/9+1/b=1/3.94
1/b=1/3.94-1/9
1/b=9/35.46-3.94/35.46
1/b=5.06/35.46
1/b=1/7.00790514
b=7.00790514
rate for B alone 7.00790514