The Public Examination Viii

THE PUBLIC EXAMINATION SUBJECT : MATHEMATIC GRADE : VIII I.

1.

CHOOSE THE RIGHT ANSWER. 7a + 2b² - 3c – 6b² + 8c – 5a = …. a. 2a - 4b² - 5c c. 2a - 4b² + 5c b. 2a + 4b² - 5c d. 2a + 4b² + 5c

2.

-3x ( 2 – 4x + 5y) = …. a. -6x - 7x² - 8xy c. -6x + 12x² - 15xy b. -6x + 7x² - 8xy d. -6x - 12x² + 15xy

3.

( 2x - 4 )( 3x + 3 ) = …. a. 6x² - 6x + 12 c. 6x² - 6x -12 b. 6x² + 6x + 12 d. 6x² + 6x – 12

4.

( 3x – 2 )² = …. a. 9x² - 12x + 4 b. 6x² - x - 4

c. 5x² - 5x +6 d. x² - 6x + 12

5. The factorize of x² + 6x + 8 is …. a. ( x + 2 )( x + 4 ) c. ( x + 2 )( x - 4 ) b. ( x - 2 )( x + 4 ) d. ( x - 2 )( x - 4 ) 6. The factorize of 9x² - 144 is …. a. ( 9x - 2 )( x + 16 ) c. ( 9x + 2 )( x - 16 ) b. ( 3x - 12 )( 3x + 12 )

d. ( 3x + 12 )( 3x + 12 )

7. Which is the function of the following statement? a. Name of the students with them ages b. Name of the teachers with them classmate c. Name of the fathers with them children d. A number with its factors 8. The domain of the ordered pairs {( 0 , -1 ), ( 1 , 1 ), ( 2 , 3 ), ( 3 , 5 ) is a. { -1, 0 ,1, 2, 3, 5 } c. { -1, 2, 5, 8 } b. { -1, 1, 3, 5 } d. { 0, 1, 2, 3 } 9. Which is the function of the following ordered pairs? a. { ( -1, 1), ( -1, 0 ), (1, 1 ), (1, 0) } b. { ( -1, 3 ), ( 1, 5 ), ( 2, 6 ), ( 3, 10 ) } c. { ( 4, -2 ), ( 4, 2 ), ( 9, 3 ), ( 9, -3 ) } d. { ( 0, -2 ), ( 0, -1 ), ( 0, 1 ), ( 0, 2 ) } 10. Given a function f(x) = -2x -1 , if f(x) = 15, so x = …. a. -8 b. -7 c. 7 d. 8 11. The domain of a function f(x) = -2 + 4x is { -1, 0, 1, 2, 3 }. The range of this function is …. a. { -18, -14, -10, -6 } c. { -6, -2, 2, 6, 10 }

b. { -15, -11, -7, -3 }

d. { -2, 0, 2, 4, 6 }

12. Given the ordered pairs { (3, 6 ), ( 3, 9 ), ( 5, 10 ), ( 7, 14 ) }. The relation of its is …. a. less than c. more than b. the factor of d. the multiply of 13. The formula of a function of the ordered pair { ( 2, -1 ), ( 4, -2 ), ( 6, -3 ), ( 8, -4 ) } is …. a. f(x) = -½ x c. f(x) = -2x b. f(x) = ½ x d. f(x) = 2x 14. Given A = { a, b, c } and B = { 1, 2 }. The numbers of a function of A and B is …. a. 2 b. 4 c. 6 d. 8 15. A straight line through A( -8, 6 ) and B( 2, -4 ). The slope of this straight line is …. a. -5/3 b. -1 c. -1/5 d. 1 16. Given the equation of straight line y = -3x + 7. The slope of this equation of straight line is …. a. -4 b. -3 c. 4 d. 7 17. Line l is perpendicular to the equation of straight line y = -2x + 5. The slope of line l is …. a. -2 b. -½ c. ½ d. 2 18. The straight line through the center of Cartesian plane and the slope of this line is 5. The equation of straight line is …. a. y = x c. y = 3x b. y = 2x d. y = 5x 19. The straight line through the line y on ( 0 , 4 ), and the slope the straight line is -3. The equation of straight line is …. a. y = 3x + 4 c. y = -3x + 4 b. y = 3x - 4 d. y = -3x – 4 20. Line h parallel to y = 3x – 2 and through the point ( 2 , 10 ). The equation of the straight line is …. a. y = 3x + 4 c. y = 3x + 10 b. y = 3x + 2 d. y = 3x + 8 II.

Answer correctly and carefully! 1. Given f(x) = ax + b, f(2) = 4, and f(-6) = -20. a. Determining a and b b. What is the formula of this function? c. Determining f(5) 2. The straight line through the point A( 4 , 5 ) and point B( 6 , -3 ) a. What is the value of the slope of the straight line? b. What is the formula of equation of straight line? c. Make a graph of the equation of the straight line