120_ch.9_review

120_ch.9_review - MAT120 Chapter 9 Test Practice

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Unformatted text preview: MAT120 Chapter 9 Test Practice Name___________________________________ Perform the indicated operation or operations. 1) (6 - 8)2(5 - 7)3 Simplify the algebraic expression. 2) 2 - 7[5 - (6x - 4)] Solve the equation. 3) r + 6 = r + 8 5 5 7 7 Solve the inequality. Express the solution set in set-builder notation and graph the set on a number line. 4) 35x - 20 5(6x - 13) Determine whether the ordered pair is a solution of the given equation. 5) (-5, -1) 4x + 3y = -23 1 of 4 Find the x- and y-intercepts for the equation. Then graph the equation. 6) 20y - 4x = -8 y 10 5 -10 -5 -5 5 10 x -10 x-Intercept:_____________________ y-Intercept:_____________________ Find the domain and range. 7) {(6,6), (5,5), (-6,-9), (-1,7), (-12,-2)} Domain:______________________________________ Range:_______________________________________ Decide whether the relation is a function. 8) {(-5, -5), (-1, 9), (1, -2), (1, -6)} A) function Use the graph to find the indicated function value. 9) y = f(x). Find f(-3) y 4 3 2 1 -4 -3 -2 -1 -1 -2 -3 -4 1 2 3 4 x B) not a function A) 9 B) -3 C) 3 D) 1.5 2 of 4 Find the indicated function value. 10) Find f(-4) when f(x) = x2 - 2x - 2. 11) Find g(a + 1) when g(x) = 4x + 2. Find the domain of the function. 12) f(x) = x - 3 x+7 13) f(x) = -9x + 5 Find the indicated function value. 14) f(x) = 5 - 7x, g(x) = -3x + 7 Find (f + g)(x). Find the requested value. 15) Find ( f )(-4) when f(x) = 5x - 7 and g(x) = 4x2 + 14x + 5. g 3 of 4 Answer Key Testname: 120_CH.9_REVIEW 1) -32 2) 42x - 61 3) {-1} 4) {x|x -9} -12 -11 -10 -9 -8 -7 -6 5) Yes 6) (0, - 2 ), (2, 0) 5 y 10 5 -10 -5 -5 5 10 x -10 7) domain = {6, -6, -12, -1, 5}; range = {6, -9, -2, 7, 5} 8) B 9) C 10) 22 11) 4a + 6 12) {xx is a real number and x -7} 13) {xx is a real number} 14) -10x + 12 15) - 27 13 4 of 4 ...
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