z varies inversely with the product of x and y. If z = -3 when x = -1 and y = 6, what is z when x = 2 and y = -9?
1. Determine the relationship expression:
Since varies inversely with the product of and , we can write , where is a constant.
2. Find the value of :
When , , and . Substituting these values into the expression gives .
Simplifying, , which means .
3. Find Click "Show Answer" to reveal the answer and analysis
Click "Show Answer" to reveal the answer and analysis
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