book Maths Puzzle Numerical Ability

Question 1:
For #1 - 10, find the area and perimeter of rectangles with the given measurements. Use the common formulas, substitute, and solve.

39 mm wide, 2x mm long
perimete

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book Other Question
How do I graph -1 + 2X + b? A rectangular playground is being constructed using a barn as one side and 80 meters of fencing to form the other three sides. What is the maximum area of such an enclosure?