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Elis [28]
3 years ago
8

According to the order of operations, which of the following should be evaluated first? exponents multiplication or division exp

ressions within parentheses addition or subtraction
Mathematics
2 answers:
eduard3 years ago
6 0
The appropriate choice is ...
   <span>expressions within parentheses </span>
AleksandrR [38]3 years ago
6 0

the correct answer is the expression with parentheses


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Step-by-step explanation:

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Write the standard form equation of the ellipse shown in the graph, and identify the foci.
vlada-n [284]

Answer option A

From the given graph is a Vertical ellipse

Center of ellipse = (-2,-3)

Vertices are (-2,3)  and (-2,-9)

Co vertices are (-6,-3) and (2,-3)

The distance between center and vertices = 6, so a= 6

The distance between center and covertices = 4 , so b= 4

The general equation of vertical ellipse is

\frac{(x-h)^2}{b^2} + \frac{(y-k)^2}{a^2}=1

(h,k) is the center

we know center is (-2,-3)

h= -2, k = -3 , a= 6  and b = 4

The standard equation  becomes

\frac{(x+2)^2}{4^2} + \frac{(y+3)^2}{6^2}=1

\frac{(x+2)^2}{16} + \frac{(y+3)^2}{36}=1

Foci  are (h,k+c)  and (h,k-c)

c=\sqrt{a^2-b^2}

Plug in the a=6  and b=4

c=\sqrt{6^2-4^2}

 c=\sqrt{20}

  c=2\sqrt{5}, we know h=-2  and k=-3

Foci  are   (-2,-3+2\sqrt{5})  and  (-2,-3-2\sqrt{5})

Option A is correct

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3 years ago
Is my answer right? I think it’s A, but I don’t want to get it wrong.
never [62]
The answer is 16 if you solve it, because the square root of 64 is 8 and 2 * 8 = 16
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3 years ago
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