exam Maths Puzzle Numerical Ability

two complementary angles are congruent. find the measure of each angle

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exam Other Question

fine all solutions of the equation in the interval [0, 2π) algebraically.

(sec^2(x)) + tanx = 3 To meet the governments specifications, an alloy must be 65% aluminum. How many pounds each of a 70% aluminum alloy and a 54% aluminum alloy will be needed to produce 640 pounds of the 65% aluminum alloy?

Any help with this one is appreciated!