Math 017 Materials With Exercises

18 a) 9 b) 3 c) 3 d) 3e) 6 f) 279 a)1 1 b)3 3c)1 d)910 a) 1 b) 2 c) 3911 a) −3 b) −0.4 c) −0.1212 a) −12 b) −3 c) −2 d) −22213 a) b) 32c) 9114 a) 0. 2 b) 231c) 0.05 or 201 e) 3 f)3d) 415 a) x z 1b) z 3166xa) 3x2172 3x3 2 7 27a) or x b) x c) x32 2 2 2 d) x182a) x2b) 25x2c) x2d) 25x2e) x 2x 1f)219 a) 1 2x x b)d) 1022x 2 2 9 2x c) x x x d) 0444x b) 3x 2 2x1c) 6x 2 4x 2 d) 3x2 5x 29x 2 6x f) 3x 2 7x 2 g) 8x 1h) 2x2 2x 32s 3 735 2 b) 2s c) 10s d) s20 a) 3e) 121 a) s22 x4 3m mb)4 34s 2s23 a)244a) 10s10 12b) 8s 8s4c) s252a) 26s2b) 4m2c) 4m264 44a) ( 2b) 16bb) 16b c) equal d) 04 4 4 4 4e) b 4b 6b 4b b 0 f) equal27 4 x28 a) 3mmb) 2mc) 63d) m e) m f) m29 a) 3yb)30 ( 6x 2)(4x 2)Lesson 82 3y c) y d) 5y1 One can solve an equation but not an algebraic expression_. If the left hand side of an equation is equal to the right handside of the equation for x 7 , then 7 is called a _solution_. The solutions_ of an equation are all values of variablesthat make the equation true. The statement that contains two quantities separated by an equal sign is called an _equation .A _solution__ always makes the _equation_ true.2 Equations: b) 5x 2 c) x 2 36 e) x 4 2x3 Both Tom’s and Mary’s answers are correct, because x=3 is equivalent to both 3=x and −x=−3.4 False. 7 is not a solution of 2(x + 1) − x = 7.5 None of the numbers is a solution of x 4 16 . The number 2 and −2 are solutions of x 4 =16.6 a) No b) Yes136x126Answers to Exercises