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inn [45]
3 years ago
6

If x/y + y/x = -1 , find the value of x^3 - y^3

Mathematics
1 answer:
marin [14]3 years ago
7 0

Answer:

  0

Step-by-step explanation:

Multiplying the first equation by xy, we have ...

  x^2 +y^2 = -xy

Factoring the expression of interest, we have ...

  x^3 -y^3 = (x -y)(x^2 +xy +y^2)

Substituting for xy using the first expression we found, this is ...

  x^3 -y^3 = (x -y)(x^2 -(x^2 +y^2) +y^2) = (x -y)(0) = 0

The value of x^3 -y^3 is 0.

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At the movie theatre, child admission is $6.20 and adult admission is $9.80 . On Monday, twice as many adult tickets as child ti
amid [387]

x= child

2x = adult


6.20x +9.80(2x) =593.40

6.20x +19.6x=593.40

25.80x =593.40

x=593.40/25.80 = 23

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3 0
3 years ago
A shop makes 3250£ in march in april it makes 3542.50£ what if the percentage increase
erastova [34]

Answer:

Step-by-step explanation:

10%=325

1%=32.5

325-32.5=292.5

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So 9% increase.

8 0
3 years ago
I need step to step help please.
VMariaS [17]

The equation and steps are...

First, find the slope of the original equation.  In this case, the slope is -8.  You know that perpendicular lines have slopes that are negative reciprocals, so the negative reciprocal of -8 is 1/8.


Now, use this new slope and the given point to find the y-intercept:

 y = mx + b

4 = (?)(2) + b

4 = ? + b

15/4 = b

 

Use the new slope and y-intercept to write the new linear equation:

 Answer:

y = 1/8x + 15/4


Sorry if i'm wrong

seemed easy

8 0
4 years ago
A recipe asks for 6 1/4cups of flour.
lesantik [10]

Answer:The answer is 3 1/8

You multiply 6 1/4 and 1/2 together to get your answer.

I've done the same test too

Step-by-step explanation:

3 0
3 years ago
An arts academy requires there to be 3 teachers for every 75 students and 6 tutors for every 72 students. How many tutors does t
suter [353]
5 teachers and 10 tutors because we can make a proportion:

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Hope this helps!
4 0
3 years ago
Read 2 more answers
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