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kirill115 [55]
3 years ago
11

C.9 D.36 No Guessing and Please show work

Mathematics
1 answer:
sattari [20]3 years ago
3 0

The centroid is 1/3 the distance from any side to the opposite vertex (along the median). That is, the centroid divides the median into parts with the ratio (1/3):(2/3) = 1:2. Then QE = (1/2)AQ, so

... QE = (1/2)·18 = 9 . . . . matches selection C.

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2x-5y=-28 find the value of y when x equals -19
nydimaria [60]
<h3>Question:</h3>

2x-5y=-28 find the value of y when x equals -19

<h3>Answer:</h3>

Y = - 2

<h3>Step-by-step explanation:</h3>

First you plug in -19 where x is 2(-19)-5y = -28

Remove parentheses               -2 · 19-5y= -28

Multiply -2 by 19                       -38-5y= -28

Add 38 to both sides               -5y = 10

Divide both sides by -5            [tex]\frac{-5y}{-5} =\frac{10}{-5}[/tex

you will get -2 which is the answer.


Hope this helped!


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Answer:

317 IS THE ANSWER

Step-by-step explanation:

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3 years ago
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What is 7/5 as a decimal number
charle [14.2K]
<span>To convert a fraction to decimal simply divide the top number by the bottom number. This would give you 1.4. Hope this helped!</span>
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PLS PLS PLS HELP I WILL GIVE BRAINLIEST!!
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Answer:

-\frac{9}{11}

Step-by-step explanation:

-\frac{6}{11} + -\frac{3}{11} = -\frac{6}{11} - \frac{3}{11} = -\frac{6+3}{11} = -\frac{9}{11}

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4 years ago
What is the complex formula for dilation with scale factor 2 and rotation by 90
zhuklara [117]

Answer:

  z' = 2iz +11 -2i

Step-by-step explanation:

Dilation multiplies each point by the scale factor. Rotation by 90° CCW is equivalent to multiplication by i.

When the center is not the origin, the transformation is applied to the difference from the center, then the result is added to the center.

  z' = 2i(z -(3+4i)) + (3+4i)

Simplifying gives ...

  z' = 2iz -6i +8 +3 +4i

  z' = 2iz +11 -2i

_____

<em>Check</em>

For example, consider the point 1 unit east of the center of dilation/rotation. That point is z = 4+4i. Applying the transformation moves this point to ...

  z' = 2i(4 +4i) +11 -2i = 8i -8 +11 -2i

  z' = 3 +6i . . . . . 2 units north of the center of dilation/rotation

This is where it is expected to be after dilation by a scale factor of 2 and rotation 90° CCW.

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