exam Maths Puzzle Numerical Ability

hello i want to know the answe for this thank you

2(x+2) divided 4(x-2)
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5(x-3) 5x-15

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exam Other Question

Having trouble with cost functions in general. My problem is below.
Assume each of the following can be expressed as a cost function. find the appropriate cost function in each c Graph y=3/4x-4