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djverab [1.8K]
2 years ago
7

What is the property of (4 + 7) + 8 = 4 + (7 +8) ?

Mathematics
1 answer:
nasty-shy [4]2 years ago
4 0

Answer:

Commutative

Step-by-step explanation:

2 + 4 = 4 + 2 as an example

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Which expression is equal to<br> -18b^-4
victus00 [196]

Answer:

-  \frac{18}{ {b}^{4} }

Step-by-step explanation:

- 18b {}^{ - 4}

express b^-4 with a positive exponent using:

a {}^{ - n}  =  \frac{1}{ {a}^{n} }

- 18 \frac{1}{ {b}^{4} }

-  \frac{18}{ {b}^{4} }

8 0
3 years ago
All questions are about this system of equations:
sertanlavr [38]
If we are eliminating x, we would multiply the 2nd equation by -5

5x + 18y = 23
x + 3y = 2....multiply by -5
-----------------
5x + 18y = 23
-5x - 15y = - 10 (result of multiplying by -5)
----------------add
0 + 3y = 13.....bye-bye x :)

6 0
3 years ago
Help Me Plzzzz and Thank U for ur time.
son4ous [18]

Answer:

  • Dilation
  • Reflection
  • Translation
  • Rotation
  • Reflection
  • Translation

Step-by-step explanation:

<em>Dilation</em>

Dilation multiplies the distance from a point to the center of dilation by the dilation factor. It does this for every point.

The center of dilation itself has zero distance from the center of dilation. Multiplying that by the dilation factor still gives zero, so the point that is the center of dilation remains unchanged.

<em>Reflection</em>

Reflection mirrors a point across some line. Each point ends up the same distance on the other side of the line that it was originally from the line.

The segment joining a point with its reflection is perpendicular to the line, so the line of reflection is the perpendicular bisector of the segment joining any point with its image.

<em>Rotation</em>

The angle defined by a point, the center of rotation, and the point's image is the angle of rotation. It is the same for every point.

The center of rotation doesn't go anywhere; it is "invariant".

<em>Translation</em>

Moving an image without changing its size or orientation is translation. Every point moves the same distance in the same direction, so any lines in the original figure have the same length and orientation in the translated figure: they are parallel.

4 0
3 years ago
Please help!!!! I need it quick!!!!
alukav5142 [94]

Answer:

f(4) = 49

f(-3) = -35

Step-by-step explanation:

f(4) = 12(4) + 1 = 48 + 1 = 49

f(-3) = 12(-3) + 1 = -36 + 1 = -35

7 0
3 years ago
I don't understand and I need this done someone please help
Hatshy [7]
Divide them and then multiply
5 0
3 years ago
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