Choose the correct answer. If y varies inversely as x so that y = 4 when x = 9, what will x be when y = 5?

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17. Choose the correct answer.
If y varies inversely as x so that y = 4 when x = 9, what will x be when y = 5?
18. Choose the correct answer.
If y = kx and x = 8 when y = 6, what is the constant of proportionality?

SnapAndSolve AI · Accepted Answer

17. Since y varies inversely as x, we have y = k/x. Given y = 4 when x = 9, we find k = 4 * 9 = 36. When y = 5, x = k/y = 36/5 = 7.2. The closest option is 7 1/5. 18. Given y = kx, and x = 8 when y = 6, we find k = y/x = 6/8 = 0.75. The correct answer is 0.75.

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Choose the correct answer. If y varies inversely as x so that y = 4 when x = 9, what will x be when y = 5?

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