exam Maths Puzzle Numerical Ability

you have 80 yards of fencing to enclose a rectangular region. find the dimensions of the rectangle that maximize the enclosed area. what is the maximum area?

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exam Other Question

Please help solve 14 + (-1). The answer I got was 13. I just want to make sure that my answer is correct. I am a little rusty on this problem. Thank you for your help. Evaluate the following expression for a = 6, b = 3 and c = 4.
a ÷ b + 2c