# 2nd Exam Math 9

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The Lord’s Wisdom Academy of Caloocan Inc. 1162 Santolan St., Corner Guyabano St., Camarin Caloocan City No. Junior High School Department Second Quarter Examination in Mathematics 9 Name: __________________________ Grade/Section: _ Score: __________________ Teacher: Date: ___________________Parent’s Signature: _______ l. Choose the letter of the best answer and write it on the blank before the number. ____1. What do you call to the graph of a quadratic function? A. Horizontal C. Vertical B. Parabola D. V-shape ____2. What term is used in finding the turning point if the graph of quadratic function? A. Axis of symmetry C. Points B. Degree D. Vertex ____3. In the function f(x)= 3x2 + 8x + 12, what is the opening of parabola? A. Downward C. Right B. Left D. Upward ____4. Given the function f(x)= -5x2, what is the value of a? A. -5 B. 0 C. 2 D. 5 ____5. What is the vertex of the quadratic function f(x) = x2 + 8? A. (0,0) B. (0,8) C. (8,0) D. (8,8) ____6. What are the zeros of f(x) = x2 + 6x + 9? A. 3 and 3 C. -3 and 3 B. 3 and -3 D. -3 and -3 ____7. What do you call to the variable k in a variation? A. Constant C. Coefficient B. Variable D. Number ____8. What is the graph of direct linear variation? A. Circle C. Parabola B. Curved line D. Straight line ____9. What kind of variation applies in the equation V = kd? A. Direct linear variation C. Join Variation B. Inverse variation D. Squared linear variation ____10. Which of the following equation is read as p varies jointly as q and s? A. P = kqs C. q = Pks B. P = qs D. qs = P ____11. Which equation represents an inverse variation? A. V = c/a B. V = cb C. V = ka/c D. V = kbc ____12. What is y when x is 19, if y varies directly as x and y = 24 when x = 6? A. 75 B. 76 C. 77 D. 78 ____13. What is the constant of variation in y = kx when y = 25 and x = 5? 2 A. 0 B. 1 C. 2 D. 3 ____14. What is the graph of direct square variation? A. Horizontal Line C. Vertical Line B. Parabola D. Diagonal Line ____15. What do you call to all numbers with rational exponent that can be express in radical form? A. Linear Equation C. Quadratic Expression B. Polynomial Expression D. Radical Expression ____16. What symbol use to indicates roots of the number? A. Index C. Radical sign B. Radical form D. Radicand 8 ____17. What is the radicand in the expression 9? A. 3 B. 5 C. 8 D. 9 3 ____18. What is the principal root of 8 ? A. 2 B. 3 C. 4 D. 8 3 ____19. Which expression is equivalent to 54 ? 4 3 4 5 A. 53 B. 54 C. 35 D. 43 ____20. Given 5x0 + 2-1, What is the simplified form of the expression? A. ½ B. 0 C. 1 D. 2

ll. Determine the direction of the parabola and find the vertex of each quadratic. Write your answer on space provided. Function Direction of parabola Vertex 1. f(x)= 5x2 __________________ _________ 2. f(x)= -6(x-4)2 __________________ _________ 3. f(x)= (x-6)2 +10 __________________ _________ 4. f(x)= 3(x+4)2 – 4 _________________________ ____________ 5. f(x)= -4x2 ________________________ _____________ lll. Apply the laws of exponent. Write your answer on the space provided. 1. (3)3(4)2 = _________ 6. (x4)(y7) = _________ 2. (52)2 = _________ 7. (5)-2 = _________ 3. (52)3(4) = _________ 8. (3xy)0 = _________ 4. 25/25 = _________ 9. (x2y3z4)5 = _________ 5. ((4) (2) ) = 3 2 2 _________ 10. (a b c ) (ac) = _________ 2 3 4 5 lV. Write each radical form to exponential form. Write your answer on the space provided. 3 8 x 1. 253 = _________ 4. = _________ 2 9 2. 9x2 = _________ 3 1 5. 4 = _________ 7 3. 9 x2 = _________ V. Simplify the following radical expression. = __________ = __________ 1. 125x 4. 32 = __________ 2. 512�2 = __________ 5. 3 x = __________ 3. 216�4