In the given problem, apply your knowledge in algebraic expression and basic mathematics especially in solving word problem involving direct and inversely variation.
Given Statement
If A varies inversely as B and A is twice as B and the value of B = 10 find A when B = 20
Mathematical Equation
A = k/B, k is constant
A = 2B, B = 10
A = 20
Solution
Solve for k
A = k/B, when A = 20, B = 10
20 = k/10
k = 20(10)
k = 200
Solve for A
k = 200, B = 20
A = k/B
A = 200/20
A = 10
Answer: 10
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define if it is vary directly, vary inversely, or neither of them
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