3 years ago

Select the expression equivalent to (-2x + 8.1y) - (-9x + 5.3y).

Mathematics

1 answer:

makvit [3.9K]3 years ago

3 0

ANSWER
D.) 7x+2.8y

Hope this helped!

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Answer please...................

Debora [2.8K]

It means that all values of x would make it true. Also take a look at the equation when we simplify:

4x + 7 = 1 + 4x + 6
Which simplified turns into
4x + 7 = 4x + 7

So no matter what value you put for x, it will be the same on both sides, making all values true for x.

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3 years ago

8) Factor each sum or difference of cubes completely.<br> a. 8x3 + 27

ASHA 777 [7]

Answer:

$\large\boxed{(2x+3)(4x^2-6x+9)}$

Step-by-step explanation:

$8=2^3\\\\8x^3=2^3x^3=(2x)^3\\\\27=3^3\\\\8x^3+27=(2x)^3+3^3\qquad\text{use}\ a^3+b^3=(a+b)(a^2-ab+b^2)\\\\=(2x+3)\bigg((2x)^2-(2x)(3)+3^2\bigg)=(2x+3)(4x^2-6x+9)$

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Jet001 [13]

Answer:

a reflection

Step-by-step explanation:

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3 years ago

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topjm [15]

Answer:

y= 25x

Step-by-step explanation:

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Answer:

Step-by-step explanation:

11 no

46+4x=90 degree(being perpendicular)

4x=90-46

x=44/4

x=11

12 no

They are complementary angles

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angle B=180-27

angle B=153

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angle DFE=142 degree

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They are vertically opposite angles.

7 no

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