exam Maths Puzzle Numerical Ability

-2t(t - 5tsquared) + (-5tcubed)

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exam Other Question

Bricklayers use the formula N=7LH to estimate the number of bricks N needed to build a wall of height H and length L.
What is the height of the wall that is 30 feet long and that requires 2310 bricks to build? X+1=radical 17-4x