 1st summative 2021-MATH 9

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Republic of the Philippines Department of Education ___16. If the discriminant is equal to 36 , then the nature of roots is ___ a. real and equal c. irrational and not equal b. rational, and not equal d. no real roots ____17. When the discriminant is 0 , then the nature of roots is ___ a. real and equal c. irrational and not equal b. rational, and not equal d. no real roots ____18. When the discriminant is 56 , then the nature of roots is ___ a. real and equal c. irrational and not equal b. rational, and not equal d. no real roots ____19. When the discriminant is -4 , then the nature of roots is ___ a. real and equal c. irrational and not equal b. rational, and not equal d. no real roots ____(20-21). The sum of two numbers is 12 and their product is 35. What are the two numbers? a. 5,7 b. -5,-7 c. 5,-7 d. -5,7 ____(22-23) A rectangular garden has an area of 14 m2 and a perimeter of 18 meters. Find the dimensions of the rectangular garden. The figure above shows how to set up the problem. a. -2,7 b. 2,-7 c.2, 7 d. -2,-7 ____24. Which of the following mathematical statements is a quadratic inequality? a. 2r2 – 3r – 5 = 0 c. 3t2 + 7t – 2 ≥ 0 b. 7h + 12 < 0 d. s2 + 8s + 15 = 0 ____25. Which of the following coordinates of points belong to the solution set of the inequality x2 + 5x< 1? a. <-6,1> b. (-6,1) c.<-6,1) d. (-6, 1)> ____26. Which of the following equations represents a quadratic function? a. y = 3 + 2x2 c. y = 3x – 22 b. 2y2 + 3 = x d. y = 2x – 3 2 ____27. The quadratic function f(x) = x + 2x – 1 is expressed in standard form as a. f(x) = ( x + 1 ) 2 + 1 c. f(x) = ( x + 1 ) 2 + 2 b. f(x) = ( x + 1 ) 2 – 2 d. f(x) = ( x + 1 ) 2 – 1 ____28. The zeros of the quadratic function described by the graph is a. 1, 3 b. -1, 3 c. 1, -3 d. -1, -3 ____(29-30). Which of the following shows the graph of f(x) = 2(x-1)2 – 3 ? a) b) c) d) Prepared by: ARTURO DE LEON / VIKZON D. ESTRELLA Subject Teacher Brgy. Malaruhatan, Lian Batangas School ID:307706 Contact nos.: 09565127162 landline: (043) 740-8218 [email protected] 