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slavikrds [6]
3 years ago
5

Math assignment I need help ASAP

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Answer:

Option B: -4 - 15x - 10 + 4x = -45

Step-by-step explanation:

The second step of the equation is to distribute 5 to the numbers in the parenthesis

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Answer:

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H=−4.9t2+25t
lina2011 [118]

ANSWER

5

EXPLANATION

The equation that expresses the approximate height h, in meters, of a ball t seconds after it is launched vertically upward from the ground is

h(t) =  - 4.9 {t}^{2}  + 25t

To find the time when the ball hit the ground,we equate the function to zero.

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Factor to obtain;

t( - 4.9t + 25) = 0

Apply the zero product property to obtain,

t = 0 \: or \:  \:  - 4.9t + 25 = 0

t = 0 \:  \: or \:  \: t =  \frac{ - 25}{ - 4.9}

t=0 or t=5.1 to the nearest tenth.

Therefore the ball hits the ground after approximately 5 seconds.

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