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Tom [10]
3 years ago
13

(-4x^2+3xy-y^2)/-(-7x^2-xy+6y^2)/(x^2+4xy-2y^2)

Mathematics
1 answer:
Brut [27]3 years ago
6 0
Alright, so we can start off by dividing 
-4x^2+3xy-y^2 by <span>-(-7x^2-xy+6y^2)=7x^2+xy-6y^2 using long division, getting 
     
                                   -4/7
</span>                                    _____________________
7x^2+xy-6y^2              -4x^2+3xy-y^2
                                  - (-4x^2-4xy/7-24y^2/7)
                                    __________________
                                              25xy/7+31y^2/7

Since we can't do anything at this point, we do 
-4/7+(25xy/7+31y^2/7)/(7x^2+xy-6y^2)

At this point, we can divide this by 
(x^2+4xy-2y^2), resulting in
 (-4/7+((25xy/7+31y^2/7)/(7x^2+xy-6y^2)))/((x^2+4xy-2y^2)). After that, we can't use long division since the numerator's top x exponent is 1.
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photoshop1234 [79]

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Step-by-step explanation:

Given : The mean of failures =  0.025 per hour.

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Let X be the number of failures.

The formula to calculate the Poisson distribution is given by :_

P(X=x)=\dfrac{e^{-\lambda}\lambda^x}{x!}

Now, the probability that the instrument does not fail in an 8-hour shift :-

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7 0
3 years ago
Work out the value of x.<br>Need answer soon :) ​
german

Answer:

x+20

Step-by-step explanation:

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So we plug everything in and we have  4x+5x=180 degrees

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6 0
3 years ago
Compare these two fractions ​
AleksandrR [38]

Answer:

4/6 is more than 5/12

Step-by-step explanation:

First, set the denominators of the fractions equal to eachother to make it easier to compare.  mulitiply 6 and 4 by 2 so that the denominator now equals 12, and you have the new fractions 5/12 and 8/12.  Since 8/12 is more than 5/12, 4/6 is more than 5/12.  

5 0
2 years ago
The numerator of a fraction (which is in its simplest form) is 5 less than the denominator. If the numerator is multiplied by 2,
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N = d - 5

2n/(d + 16) = n/d - 1/3 n/d
2n/(d + 16) = 2/3 n/d Divide by 2n
1 / (d + 16) = 1/3 d
Here's the tricky part.
d + 16 = 3d the two denominators are equal. the numerators are both 1.
16 = 2d
d = 8
so the numerator is d - 5
n = 8 - 5
n = 3

Let's see if it checks out.
n = 3
d = 8

2*3 = 6
8 + 16 = 24
New fraction 6/24 = 1/4
(3/8 - 1/3 ) = 1/8
3/8 - 1/8 = 1/4 so it checks with the original conditions put on it.


3 0
2 years ago
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