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uysha [10]
3 years ago
8

Find the slope between (-1, 9) and (2, 3). if you help me right know

Advanced Placement (AP)
1 answer:
8_murik_8 [283]3 years ago
5 0

Answer:

Find x if the slope between (7,-9) and (x,-13) is -1/3

slope between two points:

slope = (y2 - y1)/(x2 - x1)

plug the given data from the problem and solve for x:

-1/3 = (-13 - (-9))/(x - 7)

-1/3 = (-13 + 9)/(x - 7)

-1/3 = (-4)/(x - 7)

cross -multiplying:

3(-4) = -1(x-7)

-12 = -x+7

-19 = -x

19 = x

Explanation:

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Part 1/

5 + x - 14 = x - 7
We’ll cancel (X) from both sides;
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3 years ago
A ball is thrown into the air at a velocity of 44 feet per second. Its height in feet, h after t seconds is represented by the e
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Answer:

0.447 sec

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velocity = distance/ time

distance 'h' is a function of time 't' given by

h = 12t^{2} + 44t + 16

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⇒ acceleration = \frac{d^{2}h }{dt^{2} } = 24 \frac{ft}{sec^{2} }

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at maximum height v = 0

v^{2} = u^{2} + 2ah

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⇒ h = 118.72 ft⇒

118.72 = 12t^{2} + 44t + 16

⇒ 12t^{2} +44t - 102.72 = 0

⇒  t = -44 ± \sqrt{44^{2} - 4(12)(102.72) }     / (2 x 12)

t = 0.447 sec

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