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andrew-mc [135]
3 years ago
11

The quantity a varies directly with b and c and inversely with d. The quantity d is tripled. Which of the following must be true

for the relationship to remain the same? Both c and b must be tripled. The product of c and b must be tripled. Both c and b must be multiplied by 1/3. The product of c and b must be multiplied by 1/3.
Mathematics
1 answer:
Vinvika [58]3 years ago
8 0
Lets name the quantity Q
Q=k* \frac{b*c}{d} 

When quantity d is tripled, we get





Q=k \frac{b*c}{3d} 

To be the relationship the same, we see that we need to 
multiply  /numerator  / by  /3 


Q =  k \frac{3bc}{3d} 

So the answer should be 
"The product of c and b must be tripled."

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