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Sveta_85 [38]
3 years ago
8

Brainiest!!! please I need help​

Mathematics
1 answer:
iVinArrow [24]3 years ago
4 0

Answer:

we i now it its

Step-by-step explanation:

1 distrubutiv propety

2'community of addition

3 addition on unlike term

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Answer:

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I need help with this.​
emmainna [20.7K]

Answer:

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Step-by-step explanation:

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If f(x) = -6x - 3, find f(x) = 21.
slamgirl [31]

Answer:

\huge \boxed{x=-4}

Step-by-step explanation:

\sf f(x)=-6x-3 \\\\\\ f(x)=21

Applying substitution method and solving for the value of x.

\sf 21=-6x-3

Adding 3 to both sides.

\sf 24=-6x

Dividing both sides by -6.

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4 years ago
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F(x)=4x squared −7x+7, Find f(2)
Lana71 [14]

Answer: 9

Step-by-step explanation:

4x²-7x+7   f(2)=4*(2)^2-7(2)+7=16-14+7=9

7 0
3 years ago
A company sells widgets. The amount of profit, y, made by the company, is related to
just olya [345]

Answer:

$978

Step-by-step explanation:

Given:

  • y = amount of profit
  • x = selling price of each widget
  • y=-x^2+78x-543

To find the maximum amount of profit, differentiate the equation, set it to zero and solve for x.  Substitute found value of x into the original equation.

<u>Differentiate equation</u>

       y=-x^2+78x-543

\implies \dfrac{dy}{dx}=-2x+78

<u>Set differentiated equation to zero and solve for x</u>:

      \dfrac{dy}{dx}=0

\implies -2x+78=0

\implies 2x=78

\implies x=39

<u>Maximum profit</u>

Substitute x = 39 into the equation:

\implies -(39)^2+78(39)-543=978

Therefore, max profit is $978

7 0
3 years ago
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