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3 years ago

Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?

Mathematics

2 answers:

Dmitrij [34]3 years ago

6 0

Answer:

-4x^2-10x+6

Step-by-step explanation:

Troyanec [42]3 years ago

4 0

Answer:

-4 $x^2$ -10x+6

Step-by-step explanation:

I am going to assume the (Something)x2 means (Something) $x^2$ . Then, the expression is 2 $x^2$ -6 $x^2\\$ +4x-6x+9-3=-4 $x^2$ -10x+6

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For y = 3x - 2x^2 +5x^3<br> show how to find the value for y, when x = 3. Show your work

Mnenie [13.5K]

$y \: = \: f(x) \: = \: 3x \: - \: 2 {x}^{2} \: + \: 5 {x}^{3}$
Here, y is a cubic function of x.
When x = 3,
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$y \: = \: 9 \: - \: 18 \: + \: 135$
$y \: = \: f(3) \: = \: 126$
Hence, when x = 3, y = 126.

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3 years ago

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What is f(4) for the graph shown below?

Snowcat [4.5K]

Answer:

f(4)= 1

Step-by-step explanation:

f(x) = y

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3 years ago

A paddock is 38 m long and 14 m wide draw this to the scale of 1 : 1000

OverLord2011 [107]

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4 years ago

What is 20 percent of 240???

Charra [1.4K]

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3 years ago

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If r=20.5 and s=34.2 find S Round to the nearest tenth

astraxan [27]

Answer: option d

Step-by-step explanation:

Remember the identity:

$tan\alpha=\frac{opposite}{adjacent}$

The inverse of the tangent function is arctangent. You need to use this to calculate the angle "S":

$\alpha =arctan(\frac{opposite}{adjacent})$

Knowing that: you need to find the measure of the angle "S" , $r=20.5$ (which is the adjacent side) and $s=34.2$ (which is the opposite side), you can sustitute values into $\alpha =arctan(\frac{opposite}{adjacent})$

Then, you get that the measure of "S" rounded to the nearest tenth is:

$S=arctan(\frac{34.2}{20.5})\\\\S=59.1\°$

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4 years ago

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Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?​

Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?