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3 years ago

F(x)=3x^2+5

Mathematics

2 answers:

Nonamiya [84]3 years ago

8 0

Answer: 2x^2 + 7x + 2

Step-by-step explanation:

(3x^2 + 5) + (4x-2) - (x^2 - 3x + 1)

distribute the signs to the equations. subtraction on the last one is a little tricky because it turns all of the signs opposite. all subtraction in these kinds of problems is like this so you might want to watch out for this in the future. (:

distribute the signs to get:

3x^2 + 5 + 4x - 2 - x^2 + 3x - 1

simplify the equation. get all like variables together to get:

2x^2 + 7x + 2

Westkost [7]3 years ago

7 0

Answer:

$2 {x}^{2} + x - 1$

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alexandr402 [8]

Answer:

900 black and white copies are printed.

Step-by-step explanation:

Given:

For every 9 black and white copies printed there are 2 color copies printed.

If there are 200 color copies printed.

Now, to find the number of black and white copies are printed.

Let the number of black and white copies printed be $x.$

As given, for every 9 black and white copies printed there are 2 color copies printed.

So, 9 is equivalent to 2.

If there are 200 color copies printed.

Thus, $x$ is equivalent to 200.

Now, to solve by using cross multiplication method:

$\frac{9}{2} =\frac{x}{200}$

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3 years ago

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Step-by-step explanation:

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Answer:

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