exam Maths Puzzle Numerical Ability

Fix x in a triangle. that shows 45 degrees.

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exam Other Question

Gail can type a chapter book in 4 hours jack can type a chapter book in 10 hours. How long would it take them to type a chapter book together? roise's palm pirates, a manufacturer of electronic organizers, estimates that when x hundred palm pirates are made, the average cost per unit is given by C(x)=0.4x^2-3.68x+9.524