exam Maths Puzzle Numerical Ability

Perform order of operation. Please show me how for this one. thanks!

(X-4) (X+7)

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exam Other Question

if the perimeter of a rectangle is 108 inches, and its lenght is 3 1/4 feet, find it width. Please help me solve this equation.

Change the equation,x-y=4 to the form y=mx+b.

Thank you!