# Algebra and simplifying expressions

May 28th, 2015
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Algebra is a part of mathematics which solves problems by representing quantities by symbols (often called variables), expressing the relationships between the quantities as equations or inequalities

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1. 100 000 in binary is what number in decimal? a) 16 b) 32 c) 64 (/)2. D in hexadecimal is what number in decimal? a) 8 b) 13 (/)c) 17 3. In the following equation what is the y-intercept? 4y = 2x + 8 a) 4 b) 2 c) 8 (/) 4. Solve the following equation to find x 4x + 8y = 64 2x 8y = 86 a) 5b) 25 (/) c) 125 5. Simplify the following (w + z)(x y)(y w) (y x)(w y)(w + z)a) +1b) -1 (/)c) 0 6. 101012 + 110012 = a) 462 b) 468c) 4610 (/)7. What is 738 in binary coded decimal? a) 111100010 b) 1011100010 (/)c) 11100111000 8. (A + B)4 is (A + B)2 a) (A + B)2 (/)b) A + B c) (A + B)6 9. Given 43 - x = 21, find the value of x a) 43 - 21 (/)b) 43 + 21 c) 43 / 21 10. 143 can be expressed asa) 14 x 3 b) 14 x 14 x 14 (/) c) 14 + 14 + 14 11. 0.0000413 can be written asa) 413 x 10-7 (/) b) 0.413 x 10-

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