ONLINE MATH QUIZ BEE GR. 9

(EASY) What is the nature of the roots of the quadratic equation if the value of its discriminant is

positive and not a perfect square?

• a) Real, rational, equal

• b) Real, rational, unequal

• c) Real, irrational, unequal

• d) Not real

(EASY) Find the sum and product of the roots of 9x+5+2x²=0.

• a) -9/5 & -5/9

• b) -9/2 & 5/2

• c) 2/9 & -5/9

• d) 9/2 & 5/2

(EASY) What is the discriminant of the function

 $y=-2x^2+4x-3$  ?

• a)  -2

• b)  -8

• c)  0

• d)  6

(EASY) Find the vertex of the parabola

 $y=-\frac{1}{2}(x+5)^2+3$  ?

• a) (-5,3)

• b) (5,3)

• c)  (-5, -3)

• d)  (5, -3)

(EASY)

What is the value of  $(10^{12})^{\frac{1}{4}}?$  

• a) 10

• b)  100

• c) 1,000

• d) 10,000

(AVERAGE) If y varies inversely as x, and y = 1/5 when x = 9, find y when x = –3.

• a) -3/5

• b) -4/5

• c) 1/5

• d) 5

(AVERAGE) The width of a wall is 5 m less than its length. If the area of the wall is less than 50 m², which of

the following could be its length?

• a) 4m

• b) 7m

• c) 9m

• d) 10m

(AVERAGE) If 3 men can do a portion of a job in 8 days, how many men can do the same job in 6 days?

• a) 1 day

• b) 3 days

• c) 4 days

• d) 8 days

(AVERAGE) What is the value of k that will make 9x²+24x+k a perfect square trinomial?

• a) 8

• b) 12

• c) 14

• d) 16

(AVERAGE) The length of a garden is 4 meters more than thrice its width and its area 28 square meters.

What equation represents the given situation?

• a) x²+4x-28=0

• b) x²-4x+28=0

• c) 3x²+4x-28=0

• d) 3x²-4x+28=0