Question 1071401
1. Three times a number added to 1 is 40. Find the answer
What's the question?
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2. Choose the best estimate for the product 4 12/17 * 1 1/7
No.  This is math, not estimates.
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3. The area of the rectangle is 22 square feet. Its width is 1 1/5 feet find its width
Width = 1 1/5 feet, as stated above.
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4. evaluate the expression 4x(3 to the 3rd power)-z ( x=-4, z =-3)
Not clear.
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5. find the missing number 3/24=1/x
There's no "missing number."
If you want to solve for x, say, "Solve for x."
{{{3/24=1/x}}}
Cross multiply.
{{{3x = 24*1}}}
x = 8