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loris [4]
3 years ago
14

Correct answer and work

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
4 0

This is what the test said so option D

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Simplify x^2+xy-yx+y^2 + y^2+yz-zy+z^2 + z^2+zx-xz+x^2
Artemon [7]

Answer:

2x^2 + 2y^2 + 2z^2

Step-by-step explanation:

x^2+xy-yx+y^2 + y^2+yz-zy+z^2 + z^2+zx-xz+x^2

First step is to put all the same ones together

( FYI, xy and yx is the same thing, just like how

2 x 3 and 3 x 2 is the same thing) this time I'll bracket the groups to make it easier on the eyes

(x^2 +x^2) + (xy - xy) +( y^2 + y^2) + (yz - yz) +

(z^2 +z^2) + (zx - zx)

2x^2 + 2y^2 + 2z^2

All the others just cancel themselves out, for example, xy-xy

When anything minus themselves it will become 0

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3 years ago
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<span>ratio of the surface area of the sphere to the surface area of the cube
=
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answer

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n/6</span>
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3 years ago
Help me please. Thank you.
SVETLANKA909090 [29]

Draw 4 even lines in the rectangle

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3 years ago
Find the values of a through e that make these two relations inverses of each other.
kotegsom [21]

Answer:

Use math papa the calculator and copy and paste your work into it or use inspect if your on computer

Step-by-step explanation:

5 1
3 years ago
Assume that lines that appear to be tangent are tangent. O is the center of the circle. Find the value of x.
MariettaO [177]
Draw an imaginary line from the vertex of angle x to the center of the circle.
This divides the 4-sided polygon into two right triangles.  For example, the upper right triangle has an acute angle whose measure is 135 degrees / 2, or 67.5 degrees, and the another acute angle whose measure is x/2.

x/2 and 67.5 degrees are complementary angles, so x/2 + 67.5 deg = 90 deg.  Thus, x/2 = 22.5 deg, and so x = 45 deg.  (answer)
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3 years ago
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