A varies jointly as b and c and inversely as d, if a=100, b=10, c=2, d=40, find a when b=5, c=3, d=20......SHow your solution YOUR ANSWER SHOUL BE IN FRACTION NOT IN DECIMAL...THANK YOU
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100 = k (10)(2)/(40)
100 = k 20/40
100 = k ½
100 ÷ ½ = k ½ ÷ ½
200 = k
a = (200)(5)(3)/(20)
a = 3, 000/20
a = 150
ANSWER: a = 150
Verified answer
The answer is 150. It is a whole number.