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enot [183]
3 years ago
11

Find variable c: -65c = -5

Mathematics
1 answer:
Evgen [1.6K]3 years ago
3 0
C would equal positive 13 because do 65 divide by 5 so it would be 13 and a negative and negative equals a positive
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The area of the square, the
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B.

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I think your question is missed of key information, allow me to add in and hope it will fit the original one.  

Please have a look at the attached photo.  

My answer:

As given in the question, we know that:

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7 0
3 years ago
Find the vertex, focus, directrix, and focal width of the parabola: -1/40x^2=y
dimulka [17.4K]
For
(x-h)^2=4p(y-k)
vertex is (h,k)
distance from vertex to directix=p=distance from vertex to focus
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remember, focus is on the side of the parabola where it opens and directix is at the back
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when p is positive, it opens up

look at equation
-1/40(x-0)^2=(y-0)
times -40 to both sides
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focus is 10 units below vertex (y direction)
focus=(0,-10)

diretix is 10 above
directix is y=10

focal width=|4p|=|4(-10)|=|-40|=40




vertex=(0,0)
focus=(0,-10)
directix is y=10
focal width=40 units
3 0
4 years ago
Simplify $(1-3i)(1-i)(1+i)(1+3i)$
PSYCHO15rus [73]

(1-3i)(1-i)(1+i)(1+3i)=\\(1^2-(3i)^2)(1^2-i^2)=\\(1+9)(1+1)=\\10\cdot2=20

3 0
4 years ago
Read 2 more answers
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