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jeka94
3 years ago
11

What is the LCD of the following rational expressions?

Mathematics
2 answers:
Aloiza [94]3 years ago
8 0
\dfrac{x}{x+1} \ , \  \dfrac{7x}{x-1}

\dfrac{x (x -1)}{(x+1)(x -1)} \ , \  \dfrac{7x(x+1)}{(x-1)(x+ 1)}

<u>We know that (a + b)(a - b) = a² - b²:</u>

\dfrac{x (x -1)}{x^2 - 1}} \ , \ \dfrac{7x(x+1)} {x^2 - 1}

Answer: LCD = ( x + 1) (x - 1)
NNADVOKAT [17]3 years ago
7 0
\frac{x}{x + 1}, \frac{7x}{x - 1}

To find the least common denominator, multiply \frac{x}{x + 1} by (x - 1) and multiply \frac{7x}{x - 1} by (x + 1).

(x + 1)(x - 1) = x² - x + x - 1 ⇒ x² - 1

x² - 1 is the LCD.
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Can someone help me with these two or at least explain it pls
Bad White [126]

A withdrawal from an account means taking money out of your account. That means whatever money you have in there becomes a smaller amount because you're subtracting money from the account.

So, to work out how much money Jan withdrew as a negative sum, you just have to look at how much she took out:

-25 - 45 - 75 = -$145

This means Jan took out $145 from her account, and we write it with a negative sign because it's money that's going to be taken away from whatever's in there.

The same thing applies to Julie:

-35 - 55 - 65 = -$155

Julie took out $155 from her account, so her withdrawals were -$155.

Therefore, your final answer for 24a. is -$145 and your answer for 24b. is -$155.

7 0
3 years ago
Find the inverse of the relation. Use proper notation. {(8,−1),(−8,−1),(−2,−8),(2,8)} please help!!
tiny-mole [99]

Answer: The inverse relation is { (-1, -8), (-1, -8), (-8, -2), (8, 2) }

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6 0
3 years ago
The point (-5, 3) is reflected across the x axis. What are the coordinates of this reflection? Group of answer choices
harina [27]

Answer:

( -5, -3)

Step-by-step explanation:

8 0
3 years ago
Need help can someone help me with this question
REY [17]

In system A, the first equation multiply by 4

8x - 4y = 12 (1st)

3x + 4y = 10 (2nd)

--------------------add

11x = 22

So answer is B.



7 0
3 years ago
To draw a line segment perpendicular to XY passing through point x
Andrew [12]
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So for Part one. all you need to do is draw a straight line down from the point X. Name the end point of that line M. 

Now you will connect the line M and Z.

Thats it! I hope this helped!! :)




3 0
3 years ago
Read 2 more answers
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