If y varies jointly as x and z and y = 24 when x = 2 and z = 1, find y when x is 12 and z is 2.
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We want to find one-half of the reciprocal of 7/sqrt(98). Let's write down an expression for this:
We can rewrite 98 into
The square root of 49 is 7
This should be your answer. Let me know if you need any clarifications, thanks!