exam Maths Puzzle Numerical Ability

find two numbers who sum is 40, such that the square of one number plus 6times the other number is a minimum

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exam Other Question

triangle ABC transformed into triangle A'B'C'. Find the scale factor and determine if the dilation is a reduction or an enlargement.

Ab=6 cm BC= 8cm AC= 10 cm A'B'= 24 cm B' 15. Carpentry: A carpenter needs to pour a rectangular slab 28 ft. long, 16 ft. wide, and 6 in. thick. How many cubic yards of concrete does the carpenter need?