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Math 10007 Spring 2011 Assignment 3: Sections 1.4-1.6 Name___________________________________ DUE: Monday, January 31 Directions: Choose the one alternative that best completes the statement or answers the question. Fill-in the Scantron with your final answer. Show all work/steps on separate paper(s). SECTION 1.4 Multiply and, if possible, simplify. 6x2 35 · 1) 5 x3 A) 42 x 1) B) x5 29 C) 42x2 x3 D) x 29 Multiply and, if possible, simplify. 4p2 - 4 4p2 · 2) p 7 - 7p2 A) 3) 16p4 - 16p2 7p - 7p3 2) B) - 7 16p C) - 16p 7 D) 16p 7 x2 x2 - 7z + 12 · x2 - 9 x2 - 4x A) x (x + 3)(x + 4) 3) B) x2 x+3 C) x x+3 D) x x-3 Find the product and simplify. 5x3 y3 · y9 4) -45xy12 A) 5) x2 y -9 4) B) x3 -9 C) x3 -9y D) x2 -9 7 x · x+7 6 A) x (x + 6) 5) B) 7 6 C) 1 6 Perform the indicated operation and simplify if possible. x2 - 16 x2 + 3x + 1 ÷ 6) 2x + 6 x2 + 4x D) 7x 6(x + 7) 6) A) 2(x - 4)(x + 3) x(x2 + 3x + 1) B) (x - 4)(x2 + 3x + 1) 2x(x + 3) C) 2(x + 4)(x + 3) x(x2 + 3x + 1) D) (x + 4)(x2 + 3x + 1) 2x(x + 3) 1 Find the quotient and simplify. 4y3 8y3 z 5 ÷ 7) 9 z5 A) 8) (y - 2)3 121 9 2z 10 C) D) 32y6 9 8) B) 11(y - 2)2 11y - 22 C) 1 y-2 D) y - 2 x+9 x+7 9) B) - (x + 9)(x - 9) (x + 2)2 C) x-9 x+7 D) - x-9 x+7 5p - 5 8p - 8 ÷ p 8p2 A) 10) 1 p 5 C) 5p 11) 9y6 2z 10 x+9 x 2 - 2x - 63 ÷ -2 - x x 2 - 7x - 18 A) - 10) B) (y - 2)2 11y - 22 ÷ 11 121 A) 9) 9 2 7) B) 40p2 + 80p + 40 8p3 D) 40p3 - 40p2 8p2 - 8p z 2 + 13z + 40 z 2 + 5z ÷ z 2 + 15z + 56 z2 + 5z - 14 A) z-2 z 11) B) z C) z 2 + 15z + 56 z-2 z 2 + 7z D) z - 2 SECTION 1.5 Perform the indicated operation. Simplify, if possible. 4 2 + 12) 8x2 8x2 A) 3 13) 3 C) 4x2 4 3x2 D) 3 2x4 3x + 30 x + 18 2 2 x + 2x - 24 x + 2x - 24 A) 2x + 12 14) B) 12) 13) B) 2 x-4 C) 1 x-2 D) 2x + 48 x2 + 2x - 24 x2 - 11x 30 + x-5 x-5 A) x - 6 14) B) x - 5 C) x + 6 2 D) x + 5 Find the least common denominator (LCD). 5 3 15) , x x+7 A) x(x + 7) 16) B) 15 C) x + 7 D) x 4 8 , 12x 15x 2 A) 60x3 17) 15) 16) B) 60 C) 60x D) 60x2 8 4 , 2 5x - 10 x - 4x + 4 A) 5(x - 2)(x + 2) 17) B) 5(x + 2)(x + 2) C) 5(x + 2)(x - 2) D) 5(x - 2)(x - 2) Rewrite the rational expression as an equivalent rational expression with the given denominator. x = 18) x + 4 3x + 12 A) 19) 3 3x + 12 B) x 3x + 12 C) 3x 3x + 12 D) 4x 3x + 12 20 = 10 - y y - 10 A) - 1 y - 10 19) B) - 20 y - 10 C) - 20(y - 10) y - 10 D) 20 y - 10 Perform the indicated operations. Simplify if possible. 3x 4 6 + 20) x + 1 x - 1 x2 - 1 A) 21) 3x x-1 B) 20) 3x - 2 x+1 C) 3x - 2 x-1 D) x+1 x-1 t-1 t+ 5 t-3 + 4 - t t + 4 16 - t2 A) 2t2 + 5t + 27 16 - t2 21) B) -2t2 - 5t - 27 t2 - 16 C) 2t2 + 5t - 27 16 - t2 D) 2t2 + 5t - 27 t2 - 16 Perform the indicated operation. Simplify if possible. 7 16 + 22) x-4 4-x A) 23) 23 x-4 B) - 22) 9 x-4 C) - 23 x-4 D) 9 x-4 6x - 8 +1 x+2 A) 6x - 6 x+2 18) 23) B) 7x - 6 x+2 C) 3 5x - 6 x+2 D) 6x + 6 x+2 24) 6x 24 2 2 x - 5x + 6 x - 6x + 8 24) A) 6(x - 6) (x - 3)(x - 4) B) x-6 (x - 3)(x - 4) C) 6 (x - 2)(x - 3) D) 6x - 24 (x - 2)(x - 3)(x - 4) SECTION 1.6 Solve the equation. 3 4 = 25) x-8 x+2 A) 10 26) 29) 1 + D) 26 26) B) No solution C) - 2 1 2 D) - 27) B) 4 19 C) 1 19 4 19 D) - B) -14 28) C) -7 D) no solution 1 56 = x x2 A) 8, -7 29) B) -8, 7 C) 8, 7 D) - 1 1 , 8 7 y+1 y y- 3 = y + 6 y2 - 36 y - 6 A) 1 31) x + 30) B) 4 5 C) 4 3 D) 3 4 40 = -13 x A) -13, 40 32) C) 38 m+ 2 2 m- 2 = 2 2 2 m + 8 m + 15 m + 10 m + 25 m + 8 m + 15 A) 7 30) 38 7 -2x 7x 2x- 1 = + 2x + 2 4x + 4 x+ 1 A) 4 28) B) - x 2 - 5 = x- 2 x- 2 A) 2 27) 25) 31) B) -5, -8 C) 5, 8 D) 40 x+1 4 = x-8 8-x A) -3 32) B) 5 C) 3 4 D) -5