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RoseWind [281]
3 years ago
6

CAN SOMEONE ANSWER THIS??! MARKING BRAINLEST

Mathematics
1 answer:
geniusboy [140]3 years ago
8 0

Answer:

The correct answer is B

(3.98x10^8)-(3.28x10^8)=74000000

74000000 = 7.4x10^7

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Answer:

first one is 7

Step-by-step explanation:

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Yes

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y = 12(x)+28

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A square pool has a triangular platform in the center. The pool measures 5 meters on a side. The base of the triangular platform
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ololo11 [35]

Answer:

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8 more than 5 times a number

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4 0
3 years ago
Write the equation of the circle whose center is (-4,8) and has a diameter of 18
svetoff [14.1K]

Answer:

(x + 4)^2 + (y - 8)^2 = 81

or

(x + 4)^2 + (y - 8)^2 = 9^2 depending on how your teacher wants it written.

Step-by-step explanation:

The standard form for a circle is

(x + h)^2 + (y + k)^2 = r^2

r is the radius.

You are given the diameter

r = d/2

r = 18/2

r = 9

So you already have the right hand side of the equation

(x + h)^2 + (y + k)^2 = 9*2

(x + h)^2 + (y + k)^2 = 81

You basically have h and k as well. They come from the center point.

h = 4

k = - 8

So the equation of the circle (and the answer) is

(x + 4)^2 + (y - 8)^2 = 81

One question remains. Why do the x and y values change signs? If you know what the distance formula is, then what you are finding is the distance r of all points on the circle from the center of the circle.

It is the distance formula that is actually the formula for the circle.

6 0
3 years ago
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