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defon
3 years ago
10

Please answer fully :) 30 pts

Mathematics
2 answers:
rosijanka [135]3 years ago
8 0

Answer: 14 seconds :p

Hope This Helps :)

adell [148]3 years ago
3 0

Answer:

D) 14 seconds

Step-by-step explanation:

y = -4.9t^2 + 120t

We want to find out when y = 500

500 = -4.9t^2 + 120t

Subtract 500 from each side

500-500 = -4.9t^2 + 120t-500

0 =  -4.9t^2 + 120t-500

a=-4.9  b= 120 and c = -500

Using the quadratic formula

-b ±sqrt(b^2 -4ac)

-------------------------

2a

-120±sqrt(120^2 -4(-4.9)(-500))

-------------------------

2*(-4.9)

Solving this for the two solutions

t≈5.32415

t≈19.1656

The object will be above 500 meters between these two times

19.1656 - 5.32415 = 13.84145

This is approximately 14 seconds

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Find the slope of a line that passes through the given pair of points: (-3 , -1) and ( 2 , -1) .
tatyana61 [14]

Answer:

m=0

Step-by-step explanation:

m=y2-y1/x2-x1

m=-1-(-1)/2-(-3)

m=-1+1/2+3

m=0/5

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3 years ago
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The given function has Amplitude of 3, and by seeing it we can conclude that it's a sine function.

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2 years ago
What is the slope of (2,3) and (5,-3)
notsponge [240]

Answer:

-2

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3 years ago
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lana66690 [7]
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Test scores for a math class are shown below. What are the mean, median, and mode of the data set? 81, 84, 82, 93, 81, 85, 95, 8
MAXImum [283]

Answer:

Mean: 87

Median: 85.5

Mode: 81

Step-by-step explanation:

The mean can be found by finding the sum of numbers in the data set and then dividing that sum by the number of terms.

81 + 84 + 82 + 93 + 81 + 85 + 95 + 89 + 86 + 94 = 870

870 ÷ 10 = 87

Thus, the mean is 87.

--------------------------------------

The median can be found by taking off terms from each side of the data (listed in order from least to greatest) set one by one until you end up with the terms in the middle. Doing so, 85 and 86 are in the middle. Since there are two terms, we need to find the sum of the terms and divide by 2, since there are two terms in the middle.

85 + 86 = 171

171 ÷ 2 = 85.5

Thus, the median is 85.5.

--------------------------------------

The mode can be found by looking to see which number is used the most in the data set. In this case, 81 is used twice while all of the other numbers are only used once. Therefore, that is the mode.

hope this helps!

4 0
2 years ago
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