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Anettt [7]
2 years ago
5

Nine seconds elapsed from the time Mark saw the lightning until he heard the thunder. The lightning was about how many kilometer

s from Mark? (Sound travels about 331 meters per second in air.)
Mathematics
1 answer:
Alex2 years ago
7 0
The lighting was about 2.979 kilometers away from Mark
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What is the factored or of 25y^4 - 4z^2
Cerrena [4.2K]

Answer:

(5y^2+2z)(5y^2-2z)

Step-by-step explanation:

Use the difference of squares formula.

a^2-b^2=(a+b)(a-b)

a=5y^2 \\ b=2z

(5y^2+2z)(5y^2-2z)

5 0
3 years ago
Can someone please be generous and help me
Ugo [173]

Answer:

The point slope form is y-y_{1} =m(x-x_{1} )

The slope(m) can be calculated using \frac{y-y_{1} }{x-x_{1}}:

(x, y)=(4,-3)\\(x_{1} ,y_{1} )=(5,0)\\\\\frac{0-(-3)}{5-4} =\frac{0+3}{1} =\frac{3}{1} =3

Using Point One, the point-slope form is determined as:

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7 0
3 years ago
Two positive numbers have a difference of 8 and a product of 33. What are these numbers?
valina [46]

Answer:

3 and 11

Step-by-step explanation:

3 times 11 is 33

11 - 3 is 8

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3 years ago
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3 years ago
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D

Step-by-step explanation:

The answer is D because  a circle has at least a 360 degree and a 180 is a half circle.

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3 years ago
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