Answer:
a = 16
Step-by-step explanation:
inversely proportional
y = k/x
a = k/b
5 = k/4
solve for k
multiply by 4 on each side
20 =k
a = 20b
if b = 4/5
a = 20 * 4/5
The cups of water should be:
2 x 12 = 24 ( cups of water )
D, 2(b-1)/ab
subtract 2+b/ab from 3/a
it means 3/a - 2+b/ab
lcm is ab
(3b-(2+b))/ab
(3b-2-b)/ab
(3b-b-2)/ab
(2b-2)/ab
2(b-1)/ab
