1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jeka94
2 years ago
11

What is the LCD of the following rational expressions?

Mathematics
2 answers:
Aloiza [94]2 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]2 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.
You might be interested in
This rectangle represents the base of a rectangular prism. The height of the rectangular prism is 56 m.
elena-14-01-66 [18.8K]

Answer:

1,960

Step-by-step explanation:

35 times 56 = 1,960

35 is the base, to get the base you do length times width.

the height is 56. To get the volume do base (or length times width) times hight.

Hope that helps!

5 0
2 years ago
Read 2 more answers
Pls help me with this problem
Luden [163]

Answer:

A is going to be 2.80

B is going to be 0.7

C points (1,0.70)

D he is buying four pounds of flour because you always put the x at the bottom and y at the top

E it will be 6.3

Step-by-step explanation:

Hope this Helped

4 0
2 years ago
Read 2 more answers
What is 2+ 9-x divided by 4 = 10
N76 [4]
Here is the work for this equation:

2+9-x/4 =10

11-x/4=10

11-x=40

x=29
7 0
3 years ago
Two shops, Lidal and Oldi, sell the same brand of toilet rolls but with different package sizes.
Ugo [173]

Answer:

Oldi is best value

Step-by-step explanation:

<u>Lidal</u>

8 rolls for £3.76

72 rolls for £3.76*9= £33.84

<u>Oldi</u>

9 rolls for £4.14

72 rolls for £4.14*8= £33.12

Oldi offers better price for 72 rolls

5 0
2 years ago
What is the length of DD'?
zavuch27 [327]
The length of DD' is 5.39 units.
6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the measure of c to the nearest whole degree?
    9·1 answer
  • Using the diagram below, find x.
    9·1 answer
  • The amount of liquid shown is 6/7 of the originally in the container . How much liquid was in the container ?
    6·1 answer
  • What is 8/10 divided by 1 5/6
    15·2 answers
  • I have to use trigonometric identities to solve. But I’m having trouble finding the values of cos A and sin B. Can anyone help m
    9·1 answer
  • Does a rotation preserve congruence
    10·1 answer
  • Need help solving these questions!!! PLEASE HELP AS SOON AS YOU CAN!! 7.
    10·1 answer
  • If 50 grams of a radioactive substance decomposed to 42 grams in 2 years, then, to the nearest gram, the amount left after 5 yea
    5·1 answer
  • Complete the table of values for y=x^2+2x-1
    13·1 answer
  • Need some help. :/
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!