# My Math Plan Assessment #2 Study Guide

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1 My Math Plan Assessment #2 Study Guide 1. Find the x-intercept and the y-intercept of the linear equation. 8x y = 4 2. Use factoring to solve the quadratic equation. x 2 + 9x + 1 = 17. Multiply and simplify the radical expression. ( 5)( 5 2) 4. Multiply and simplify the radical expression. ( 7 9)( 7 + 5) 5. Perform the indicated operations and simplify Perform the indicated operations and simplify Simplify the expression using the properties of exponents. (The answer should contain only positive exponents.) ( 2a b 1 2 b ) 8. Simplify the expression. 72x Solve the linear inequality. 2x + 5 < 11

2 10. Solve the linear inequality. x + 15 > Solve the linear inequality. 2x Solve the linear inequality. x Rationalize the denominator and simplify if possible Rationalize the denominator and simplify if possible. x5 9xy 15. Identify the coordinates of points A and B. 16. Kara has five exam scores of 67, 74, 60, 85, and 87 in her biology class. What score does she need on the final exam to have a mean (average) grade of 72? Round your answer to two decimal places, if necessary. (All exams have a maximum of 100 points.) 17. The price of a computer is \$250. The sales tax is 7%. What is the total cost of the computer?

4 28. Multiply the polynomials using the distributive property and combine like terms. (x + 4)(2x ) 29. Multiply the polynomials using the distributive property and combine like terms. (x 2)(x 2 + 2x + 4) 0. Factor the given polynomial by finding the greatest common monomial factor (or the negative of the greatest common monomial factor) and rewrite the expression. 14x 56xy 6x 2 1. Completely factor the trinomial, if possible. 4t t Completely factor the trinomial, if possible. 6t + 41t 2 7t. Completely factor the polynomial, if possible x 2 4. Solve the following formula for the indicated variable. P = 2l + 2w; solve for w 5. The area of a trapezoid is 44 square meters. One base is meters long and the other is 8 meters long. Find the height of the trapezoid. A = 1 h(b + c) 2 6. Simplify the expression. Assume all variables represent positive numbers. 48x³y 6

5 7. The sum of two consecutive integers is 175. Find the two integers times the difference between a number and 5 is equal to 98. Find the number. 9. Evaluate the expression at x =, y = 2, and z = 4. 8x 2y z 40. The discount on a new refrigerator was \$225. This was a discount of 20%. What was the original price of the refrigerator? 41. Completely factor the polynomial, if possible. x 27y³ 42. Completely factor the polynomial, if possible. 2x + 2y + bx + by 4. Simplify the expression using the properties of exponents. x 0 5y⁰ 44. Find the GCF for the set of terms. 28c 2 d 4, 14c³, 42cd³ 45. Perform the indicated operation by removing the parentheses and combining like terms. (4b b 2 + b) ( 2b + b 2 5b) 46. Identify the vertex of the parabola with the given equation. f(x) = (x 5) Find the value of the function. Find f( 6) for f(x) = 2x + 11

6 48. Graph the linear inequality. x + 2y < Graph the linear inequality. 6x 4y Multiply the complex numbers. ( + 4i)( 9 7i) 51. Solve the radical equation. 16x 2 + 9x + 1 = 4x Solve the radical equation. 11x 2 = x Solve the radical equation. 2 + x 4 = Solve the quadratic equation using the Quadratic Formula: x = b ± b2 4ac 2a 5x 2 + 9x = Solve the quadratic equation using the Quadratic Formula: x = b ± b2 4ac 2a x 2 + 8x = Solve the quadratic equation. (x 5) 2 = 18

7 57. Solve the quadratic equation. (x + 9) 2 = Solve the quadratic equation. x 2 12 = In a certain kennel, the ratio of cats to dogs is to 4. If there are 1 cats and dogs in the kennel, how many dogs are there? 60. State the domain of the function, using interval notation. f(x) = x x State the domain of the function, using interval notation. f(x) = x 5 x Simplify the following expression. If the expression is not a real number, indicate "Not a Real Number". ( 27 2 ) The distance that a free falling object falls is directly proportional to the square of the time it falls (before it hits the ground). If an object fell 145 ft in seconds, how far will it have fallen by the end of 9 seconds? (Leave the variation constant in fraction form or round to at least 2 decimal places. Round your final answer to the nearest foot.) 64. Divide using the division algorithm. Write your answer in the form Q + R where the degree of R is less D than the degree of D. 8x² 2x + 5 4x Simplify the following radical. 27

8 66. Find the quotient. Express your answer in standard form. +2i 7 4i 67. Determine the solution of the system of equations represented by the lines in the graph. Check your solution by substituting into both equations. 68. Find the domain and range of the relation. Express your answers in interval notation. 69. Write an equation, in slope-intercept form, of the line through the given point P with the given characteristic. P( 5, 4); 5x 4y = 9 a. Parallel to the given line b. Perpendicular to the given line 70. Solve the equation. 2 x 2 9 = 1 x² + 1 x 2 x 71. Solve the equation. x x 2x + x 2 + x 12 = x 1 x + 4

9 72. Solve the equation. 2 x + x x 1 = x² x 2 4x + 7. Find the product of the binomial factors. (2x )² 74. Perform the indicated operation of addition and reduce your answer to lowest terms. x + x x 4 x 75. Find the missing length. 76. Reduce the following rational expression to its lowest terms. y 2 +14y y 2y² 77. Solve the application. A rectangle has a length of 21 feet less than 5 times its width. If the area of the rectangle is 468 square feet, find the length of the rectangle. 78. Multiply the rational expressions and simplify. 4x 2 + 6x x 2 + x 10 x2 + 4x 12 x 2 + 5x Simplify the complex rational expression. 9x² + 27x 2 24x² x 4

10 80. Find the solution of the system. 16x + 2y = 0 { 2x + y = 81. Find the solution of the system. y = 6x + 0 { 18x + 6y = If Ryan has \$1161 left after spending 1 of his monthly salary for rent and 1 of his monthly salary for his 5 8 credit card bill, what was his monthly salary? 8. Perform the indicated operation of multiplication or division on the rational expressions and simplify. 9s 2 8t 9s 2t Find the product. Express your answer in standard form. 6i( 7i) 85. Tim and Stanley leave Stanley's house at the same time. Tim drives north and Stanley drives west. Tim's average speed is 9 mph slower than Stanley's. At the end of one hour, they are 85 miles apart. Find Stanley's average speed. (Round your answer to the nearest tenth.) 86. Factor the polynomial. If the polynomial does not factor, write not factorable. 25x Solve the application. Davia is working her way through school. She works two part time jobs for a total of 2 hours a week. Job A pays \$8.0 per hour and Job B pays \$10.20 per hour. How many hours did she work at each job in a week when she earned a total of \$01.70?

11 88. Find the domain and range of the relation. Express your answers in interval notation. 89. Solve the equation. x x 4 4 2x 1 = A total of \$7000 is invested: part at 6% and the remainder at 10%. How much is invested at each rate if the annual interest is \$520? 91. A dairy farmer wants to mix a 45% protein supplement and a standard 20% protein ration to make 1800 pounds of a high-grade 0% protein ration. How many pounds of each should he use? 92. Solve the following linear equation. 8 (y 1 2 ) = 1 8 (y ) 9. Consider the function: f ( x ) = 8x + 7 a. Find the value of f ( 2 ). b. Find the value of f (a + ). 94. Consider the function: f ( x ) = x 2 + 4x + 8 a. Find the value of f ( 9 ). b. Find the value of f (a). 95. Simplify the following expression. If the expression is not a real number, indicate "Not a Real Number". ( ) 1 2

12 96. Two planes, which are 2660 miles apart, fly toward each other. Their speeds differ by 65 mph. If they pass each other in 4 hours, what is the speed of each plane? 97. Simplify the following complex fraction x 4 2 x ² 98. Shirley and Pam, working together, can mow the lawn in 6 hours. Working alone, Pam takes three times as long as Shirley. How long does it take Shirley to mow the lawn alone? 99. An airplane can travel 440 mph in still air. If it travels 950 miles with the wind in the same length of time it travels 810 miles against the wind, what is the speed of the wind? 100. z varies directly as x 2 and inversely as y 2. If z = 156 when x = 9 and y = 4, find z if x = 6 and y = 9. (Round off your answer to the nearest hundredth.)

13 Answer Key 1. x-int: ( 4 4, 0) y-int: (0, 8 2. x = 6, a 6 b x⁴ 9 9. x < x < x x x xy² 14. y 15. A = ( 2, ) B = (4, ) \$ x = x = \$111, y = y = m = y = 7 x x 2 14x x 2 + 5x x x(9x + 8y + 2) 1. (4t + 1)(t + 6) 2. t(6t 1)(t + 7). (5 9x)(5 + 9x) 4. w = P 2l 2 5. h = 8 m 6. 4xy x 7. 88, \$ (x y)(x 2 + xy + 9y 2 ) 42. (x + y)(2 + b) c 45. 6b 4b 2 + 6b 46. (5, 7) i 51. x = x = {1, 6} 5. x = x = 9 ± ± i x = 56. x = 5 ± i x = { 11, 7} 58. x = ± dogs 60. (, 0) (0, ) 61. (, 9) ( 9, ) ft 64. 2x x+ 65. i i (2, ) 68. D: [ 5, 1] R: [2, 4] 69. a. y = 5 41 x no solution 71. x = x = x 2 12x x 2 25 (x+4)(x ) 75. c = y 4 2y b. y = 4 5 x

14 77. 9 ft 78. 2x(2x+) (x+5)(x 1) 7x² x =, y = x = 4, y = \$1720 s 8. 4t i mph 86. not factorable 87. Job A: 1 hours and Job B: 19 hours 88. D: [ 2, ) R: (, ) 89. x = 90. \$4500 at 6% and \$2500 at 10% lbs of 45% protein supplement; 1080 lbs of 20% protein ration 92. y = 1 9. a. 9 b. 8a a. 215 b. a 2 + 4a mph, 65 mph x(2x 1) 97. 2(2x 2 1) hours mph 100. z = 1.70

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