z varies jointly with x and double of y. When x = 22 and y = 1, z = 6. Find z when x =11 and y = -4.
1. Determine the relationship expression:
Since varies jointly with and double of , we can write , where is a constant.
2. Find the value of :
When and , . Substituting these values into the expression gives .
Simplifying, , which is . Solving for , we get .
3. Find when Click "Show Answer" to reveal the answer and analysis
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