exam Maths Puzzle Numerical Ability

7x+-15 . (x+11)
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11x +121

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exam Other Question

from a rectangular piece of paper of size 100 cm by 80 cm are cut four squares of side 10 cm from each corner the flaps are folded and an open box is formed find the surface area of box so formed. Find the equation of the line, given the point (−1, −5) and a slope of −8. Use point-slope form.