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Maths Puzzle
Numerical Ability
Five times a number subtracted from 3 times the number equals 20. Find the number.
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You receive $5000. you decide to invest the money in a one-year bond paying 2% interest and in a one year bond certificate of deposit paying 6 % interest. If you invest $2000 in o
(1) find the exact value of sec(225degrees)
(2) In the triangle ABC, find A, if B= 100 degrees, and a=20.
(3) In the triangle ABC, find b, iF A=15, C=12 and angle b=150 degrees.