1) find one factor of 24x^2-59x-50.
A)12x+2 B) 4x+25 C) 24x-10 D) 8x-25
2) A ball is thrown vertically upward with an initial velocity of 24m/s. Its height after t seconds is given by h= 24t-4.9t^2. How long does it take it for the ball to drop 10m?
A) 0.5s B) 2.6s C) 4.4s D) 4.9s
3) What's the sum of the roots of 6x^2+15x+8=0?
A) -2.5 B) -0.96 C) 0.96 D) 5/2
A)12x+2 B) 4x+25 C) 24x-10 D) 8x-25
2) A ball is thrown vertically upward with an initial velocity of 24m/s. Its height after t seconds is given by h= 24t-4.9t^2. How long does it take it for the ball to drop 10m?
A) 0.5s B) 2.6s C) 4.4s D) 4.9s
3) What's the sum of the roots of 6x^2+15x+8=0?
A) -2.5 B) -0.96 C) 0.96 D) 5/2
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24x^2 -59x -50
24x^2 +16x -75x -50
8x ( 3x +2) -25( 3x +2)
( 8x -25) ( 3x +2)
ANSWER = 8x -25
3) - 2.5
24x^2 +16x -75x -50
8x ( 3x +2) -25( 3x +2)
( 8x -25) ( 3x +2)
ANSWER = 8x -25
3) - 2.5
-
1) D) 8x-25
2) Drop 10m from where?
3) A consequence of the quadratic formula is that the sum of the roots is
equal to -b/2a, which in this case is -15/12 = -5/4 = -1.25
so none of the proffered choices are correct.
2) Drop 10m from where?
3) A consequence of the quadratic formula is that the sum of the roots is
equal to -b/2a, which in this case is -15/12 = -5/4 = -1.25
so none of the proffered choices are correct.