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3 years ago

Please help !! Simplify the following expression

2 answers:

7 0

$x^{4} + 3 x^{3} - 2x^{3} - 5 x^{2} - x + x^{2} + x + 1 + 7 x^{4}$

Collect the terms. Meaning, collect all exponents in to one whole exponent (e.g. combine the x^4 and 7x^4).

$8x^{4} + x^{3} - 4 x^{2} + 1$

Therefore your answer is [B].

puteri [66]3 years ago

5 0

8x^4 + x^3 - 4x^2 +1. I believe the answer is B. Please correct me if I am wrong.

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In a cinema theatre, why do we normally not hear echoes even though the sounds are loud?<br>

ikadub [295]

Answer:

An echo is formed as a result of reflection of the original sound which returns to the listener. You might have experienced Echo in an EMPTY ROOM but no echo is produced after the room is occupied. To avoid echo from being produced the echo has to be absorbed. Echo in a cinema theatre is absorbed by the WALLS of the theatre.

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2 years ago

Problem Solving<br> Help

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2 years ago

Read 2 more answers

3x<img src="https://tex.z-dn.net/?f=3x%5E%7B2%7D%20%2B8x-10" id="TexFormula1" title="3x^{2} +8x-10" alt="3x^{2} +8x-10" align="a

Licemer1 [7]

The solution to the quadratic equation 3x² + 8x - 10 by using the quadratic formula is x = 0.927 or -3.594

<h3>Solving quadratic equations.</h3>

Quadratic equations are algebraic expressions that are represented in the power of the second degree. They usually take the form ax² + bx + c

From the given information, we are to solve the quadratic equation:

3x² + 8x - 10

Using the quadratic formula:

$\mathbf{=\dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}}$

where:

a = 3
b = + 8
c = - 10

$\mathbf{= \dfrac{-(8)) \pm \sqrt{(8)^2 - 4(3 \times (-10))}}{2(3)}}$

$\mathbf{= \dfrac{-(8)) \pm \sqrt{64 -4 (-30)}}{6}}$

$\mathbf{= \dfrac{-(8)) \pm \sqrt{64+120}}{6}}$

x = 0.927 or -3.594

Learn more about solving quadratic equations here:

brainly.com/question/8649555

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1 year ago

Is the line for the equation y = 1 horizontal or vertical? What is the slope of this line? Select the best answer.

Lilit [14]

Any line y=m is horizontal. The y-coordinate of any point lying on such line is m, only x-coordinates change.

If y=1, then two points on the line are (x₁,1) and (x₂,1).

$\hbox{the slope: } m=\frac{y_2-y_1}{x_2-x_1}=\frac{1-1}{x_2-x_1}=\frac{0}{x_2-x_1}=0$

So, the slope of this and any horizontal line is 0.

The answer is a.

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3 years ago

Read 2 more answers

Which two lines have the same y intercept?

sveticcg [70]

PERPENDICULAR LINES have the same y-intercept

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2 years ago