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2 years ago

Hi, so I know the answer to this problem (now that I got it wrong) but I'm not quite sure why I was wrong, help?

Mathematics

2 answers:

Maru [420]2 years ago

8 0

Answer:Because its -2x exponent of 2 so you cant do anything to that but you can touch the 2x it doesn't have a exponent so that's why but now since you did something to 2x you have to change 2x exponent of 2 into negative

Step-by-step explanation:

melisa1 [442]2 years ago

4 0

2x² + 2x + ? = x

⇒ ? = x - 2x² - 2x

⇒ ? = -2x² - x

Your answer is incorrect because 2x² - x² would mean x² is part of the answer, which is clearly incorrect.

You might be interested in

A clothing business finds there is a linear relationship between the number of shirts, Q ,it can sell and the price, P , it can

Vlad [161]

Answer:

P = -0.004Q + 149

Step-by-step explanation:

The general form of the linear equation is:

$P=aQ+b$

The slope of the equation (a) can be found by using the two given points (4,000; $133) and (27,000; $41)

$a = \frac{\$41-\$133}{27,000-4,000}\\a=-0.004$

Applying the point (4,000; $133) to the equation below yields in the linear equation for Price as a function of the number of shirts:

$P-P_0=a(Q-Q_0)\\P-133=-0.004(Q-4,000)\\P = -0.004Q+149$

The linear equation is:

P = -0.004Q + 149

8 0

3 years ago

4-(x+1)+4x help me please!!

ahrayia [7]

Hello there!

<u><em>Answer: ⇒⇒⇒⇒⇒⇒ =3x+3</em></u>

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Step-by-step explanation:

First you had to distribute parenthesis.

$-(x+1)$

$=-(x)-(1)$

Then apply minus-plus rules.

$+(-a)=-a$

$=-x-1$

$=4-x-1+4x$

Simplify.

$4-x-1+4x=3x+3$

$4-x-1+4x$

Group like terms:

↓↓↓↓↓↓↓↓↓↓↓

$=-x+4x+4-1$

Then add similar elements.

$-x+4x=3x$

$=3x+4-1$

Add and subtract by the number.

$4-1=3$

$3x+3$

$=3x+3$

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Hope this helps!

Thank you for posting your question at here on brainly.

Have a great day!

-Charlie

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3 0

4 years ago

Write the equation of a piecewise function with a jump discontinuity at x =3. Then, determine which step of the 3-step test for

seraphim [82]

Answer:

Here's a possible example:

Step-by-step explanation:

$f(x) =\begin{cases} x & \quad x < 3\\x+3 & \quad x \geq 3\\\end{cases}$

Each piece is linear, so the pieces are continuous by themselves.

We need consider only the point at which the pieces meet (x = 3).

$\displaystyle \lim_{x \longrightarrow 3^{-}} f(x) = \lim_{x \longrightarrow 3^{-}} x = 3\\\\\displaystyle \lim_{x \longrightarrow 3^{+}} f(x) = \lim_{x \longrightarrow 3^{+}} x+3 = 6\\\\f(3) = x + 3 = 6\\\\\displaystyle \lim_{x \longrightarrow 3^{-}} f(x) \neq f(3)$