exam Maths Puzzle Numerical Ability

evaluate 4 to the 2nd power + 2 times 7 - (5 times 4 -15) THis is the best way I can type it. Thanks

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Graph (x+3) (x-2)^2=0 (use maxs, mins, x and y intercepts) The sum of 5 times a number and 7/8 is equal to the difference between six times a number and 1/4. Find the number