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lianna [129]
3 years ago
12

Find all points having an x-coordinate of 2 whose distance from the point (-1,-2) is 5

Mathematics
1 answer:
mariarad [96]3 years ago
5 0
The\ equation\ of\ the\ circle:(x-a)^2+(y-b)^2=r^2\\\\where\ (a;\ b)\ -the\ coordinates\ of\ the\ center;\ r-the\ radius\\-----------------------------\\(-1;-2)-the\ center\ of\ the\ circle\\r=5\\\\The\ equation:(x+1)^2+(y+2)^2=5^5\\\\Put\ x=2\ to\ the\ equation:\\\\(2+1)^2+(y+2)^2=25\\3^2+(y+2)^2=25\\9+(y+2)^2=25\\(y+2)^2=25-9\\(y+2)^2=16\iff y+1=\pm\sqrt{16}\\\\y+1=-4\ or\ y+1=4\ \ \ \ \ |subtract\ 1\ from\ both \sides\\y=-5\ or\ y=3\\\\Answer:(2;-5)\ and\ (2;\ 3).
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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

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because its "x four times"

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Vesnalui [34]

Answer:

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  B. input: weeks; output: flowers that bloomed

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Step-by-step explanation:

<h3>Part A:</h3>

For f(s) = 2s +30, and s(w) = 40w, the composite function f(s(w)) is ...

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<h3>Part B:</h3>

The input units of f(s) are <em>seeds</em>. The output units are <em>flowers</em>.

The input units of s(w) are <em>weeks</em>. The output units are <em>seeds</em>.

Then the function b(w) above has input units of <em>weeks</em>, and output units of <em>flowers</em> (blooms).

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<h3>Part C:</h3>

For 35 weeks, the number of flowers that bloomed is ...

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2 years ago
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geniusboy [140]
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3 years ago
So I don't know to solve this <br>​
Kruka [31]

Answer:

A

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When a slope is undefined, it is always x = ?

The point (-5, -8) tells us that x = -5

Option A also has a point with x = -5

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2 years ago
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