REVIEW SECOND QUARTER EXAMINATION IN MATH 8.pptx

REVIEWER IN MATH 8

1. What is the graph of linear inequality in two variables? Straight line b. Parabola c. Half -Plane d. Solid line

2. Bianca has some ₱ 10- coins and ₱5- coins. The total amount of these coins is at most (≤) ₱900. What is the highest number of ₱ 5- coins, if there are 50 pieces of ₱10 coins? 80 pieces b. 90 pieces c. 100 pieces d. 110 pieces

3. What will be the graph of inequality with < or > symbol? A. Solid line b. broken line c. straight line d. curve line

4. Which of the following is a system of linear inequality in two variables? x + y = 4, 2x -7y > 3 b. x < 3, y > 4 c. x + 4y < 4, 2x -7y > 3 d. 2x + 3y = 4, 2x -7y = 3

5. How will you solve system of linear inequalities in two variables? Graphically b. algebraically c. both a and b d. none of these

6. Which of the following is not a way to represent a relation? Table b. Mapping Diagram c. Rule d. illustration

7. It represents persons or objects that can be manipulated, controlled, or merely measured for the sake of research. Variables b. data c. Measurement d. Survey

8. In the Statement “The number of hours of work and salary in a private company of a certain employee”, which is the dependent variable? a. The number of hours work The company c. the Salary of employee d. the employee

9. A ________ is defined by f(x) = mx + b , where m and b are real numbers. Its graph is a line with slope b and y-intercept a. Linear function b. Quadratic function c. cubic function d. none

10. At what point will the graph of (𝑥) = 2𝑥 − 10 intersects the 𝑦-axis? (0, −5) b. (5,0) c. (0, −10) d. (0,10)

11. A pay phone service charges Php 5 for the first three minutes and Php 1 for every minute additional or a fraction thereof. How much will a caller have to pay if his call lasts for 8 minutes? Php 10 b. Php 15 c. Php 20 d. Php 25

12. Sarah earns Php 42 an hour in a dress factory with an additional of Php 50 for her daily meal allowance. What equation describes her earning for one day ? f(x) = 42x + 50 b. f(x) = 50x + 42 c. f(x) = 4x + 50 d. f(x) = 50x + 4

13. Mr. Castro placed part of his separation pay amounting to Php 40,000 in some business venture. If it earns Php 5,000 a month, in how many months will his money be twice the original amount? 15 months b. 16 months c. 20 months d. 24 months

14. If it is a right angle, then it measures 90 degrees. What do you call the bolded portion in this conditional statement? Conclusion b. Hypothesis c. Conjecture d. Inverse

15. The If-then form of the statement “Parallel lines never intersect,” is: a. If two lines intersect, then they are parallel. b. If two lines are not parallel, then they intersect. c. If two lines are parallel, then they never intersect. d. If two lines intersect, then they are not parallel.

16. What is the conclusion in the statement “If the slope is positive, then the graph of the line is increasing” Graph of a line is increasing Then the graph of a line is increasing c. Slope is positive d. If the slope is positive

17. A statement joining two events together based on a condition in form of “If something, then something”. Conditional b. Converse c. Inverse d. Contrapositive

18. The inverse statement in terms of “if x, then y” is If not x, then not y If y, then x c. If not y, then not x d. If not y, then x

19. The contrapositive statement “If it rained last night, then the sidewalk is wet”. a. If the sidewalk is wet, then it rained last night. b. If the sidewalk is not wet, then it did not rain last night. c. If it did not rain last night, then the sidewalk is not wet. d. If it rained last night, then the sidewalk is not wet.

20. How can we say that the conditional statements are equivalent statements? a. If they have the same truth value b. If they are both true c. If they are both false d. all of the above

21. What is the shorthand for “if and only if” in biconditional statement? If b. iff c. fof d. if -o-if

22. Given the statements below, what the equivalent of converse? Conditional Statement: If it rains, then the ground is wet. (T) Converse: If the ground is wet, then it rained. (F) Inverse: If it does not rain, then the ground is not wet. (F) Contrapositive: If the ground is not wet, then it did not rain. (T) Converse b. inverse c. contrapositive d. none of these

23. Reasoning uses basic and/or general statements to arrive at a conclusion . Inductive b. deductive c. logic d. all of these

24. Is a logical argument in which each statement you make is supported or justified by given information, definitions, axioms, postulates, theorems and previously proven statements? reasoning b. logic c. proof d. deductive

25. Which of the following is not a way to write a proof? Paragraph b. two-column c. flow chart d. table

26. Which of the following is not a linear inequality in two variables? 2x + 3y ≤ 5 b. 3x - 3y < -2 c. x – 2y > 4 d. 4x – 2y = 5

27. Ashley bought five oranges and ten apples. The total amount that she paid is at least Php 140. How much should an apple cost if an orange cost ₱8? More than Php 10.00 b. Less than Php 10.00 c. Php 10.00 d. Php 20.00

28. The difference between the scores of Cathy and Cindy in the game lawn tennis is less than nine points. If Cathy’s score is 27 points; what could be the score of Cindy? Above 18 b. lower than 18 c. equals to 18 d. above 19

29. What will be the graph of inequality with ≤ or ≥ symbol? Solid line b. broken line c. straight line d. curve line

30. Which of the following ordered pairs satisfy both 2𝑥 + 7𝑦 > 5 and 3𝑥 − 𝑦 < 2? (0, 0) b. (10, -1) c. (-4,6) d. (2, -8)

31. Which of the following is a graph of a system of linear inequalities in two variables?

32. How will you identify if a given set of ordered pairs are function? a. If there is no repletion on the y-values It should be a set of ordered pairs c. If there is no repetition on the x-values d. There is many to one correspondence

33. In the Statement “The number of hours of work and salary in a private company of a certain employee”, which is the independent variable? a. The number of hours work The company c. the Salary of employee d. the employee

34. What is the domain of the function f(x) = 2x -1? All real numbers b. greater than 2 c. less than 2 d. 2 and positive infinity

35. Which of the following functions shows a slope of 1? f(𝑥) = −3𝑥 + 1 b. f(𝑥) = −𝑥 + 2 c. f(𝑥) = −3𝑥 d. f(𝑥) = 𝑥 + 9

36. Emman often rides a taxi from one place to another. The standard fare in riding a taxi is php 40 as a flag down rate plus Php 3.50 for every 200 meters. how much he would pay if the taxi covered the distance of 600 meters? a. Php 45 b. Php 43.5 c. Php 47 d. Php 50.50

37. A motorist drives at a constant rate of 60 kph. If his destination is 240 kilometers away from his starting point, how many hours will it take him to reach the destination? 5 Hours b. 4 hours c. 3 hours d. 3 hours

38. Sarah earns Php 260 an hour in a dress factory with an additional of Php 50 for her daily meal allowance. how long did she work for that day ? a. 3 hours b. 4 hours c. 5 hours d. 6 hours

39. If garbage is disposed properly , then dengue diseases will be prevented. What do you call the underlined portion in this conditional statement? Conclusion b. Hypothesis c. Conjecture d. Inverse

40. If it is a right angle , then it measures 90 degrees . What do you call the underlined portion in this conditional statement? Conclusion b. Hypothesis c. Conjecture d. Inverse 

41. What is the hypothesis in the statement “If it’s right angle, then it measures exactly 90 degrees” a. If it’s right angle b. Measures 90 degrees c. Right Angle d. angle measures 90 degrees

42. What is the inverse of the statement “If the number is divisible by 2 and 3, then it is divisible by 6.” If the number is divisible by 6, then it is divisible by 2 and 3. If the number is not divisible by 2 and 3, then it is not divisible by 6. If the number is not divisible by 6, then it is not divisible by 2 and 3. If the number is divisible by 2 and 3, then it is not divisible by 6

43. The statement switching the hypothesis and conclusion from the conditional statement. a. Conditional b. Converse c. Inverse d. Contrapositive

44. It is written in the form “if not q, then Not p? Conditional b. Converse c. Inverse d. Contrapositive

45. When is the time that a conditional statement will be false based on Truth Table? If p is true and q is false If p is true and q is true c. If p is false and q is true d. if p is false and q is false

46. A statement combing a conditional statement with its converse a. Inverse b. converse c. biconditional d. contrapositive

47. Given the statements below, what the equivalent of conditional statement? Conditional Statement: If it rains, then the ground is wet. (T) Converse: If the ground is wet, then it rained. (F) Inverse: If it does not rain, then the ground is not wet. (F) Contrapositive: If the ground is not wet, then it did not rain. (T) Converse b. inverse c. contrapositive d. none of these

48. Reasoning which uses specific examples to arrive at a general rule, generalizations or conclusions. Inductive b. deductive c. logic d. all of these

49. It is the science of correct reasoning? Inductive b. logic c. proof d. deductive

50. Is a method of reasoning usually written in paragraph form. The opposite of the statement to be proven is assumed true until the assumption leads to a contradiction . Direct proof b. indirect proof c. proof d. all of these