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Mama L [17]
3 years ago
15

2x/x2-25=10/x2-25 - 4/x+5

Mathematics
1 answer:
White raven [17]3 years ago
8 0
Hello,

x²-25≠0==>x≠5 and x≠-5

\dfrac{2x}{x^2-25}= \dfrac{10}{x^2-25}- \dfrac{4}{x+5}   \\

 \dfrac{2x}{x^2-25}= \dfrac{10}{x^2-25}- \dfrac{4(x-5)}{(x+5)(x-5)}   \\

2x=10-4x+20\\

6x=30\\

x= 5 

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If y=kx, where k is a constant, and y=24 when x=6, what is the value of y when x=5
Phoenix [80]
I hope this helps <span>24 = k * 6  </span><span>4 = k  </span><span>y = kx  </span><span>y = 4x  </span><span>y = 4 * 5  </span><span>y = 20 

</span>
6 0
3 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0
2 years ago
Pluto is 5913000,000 km from the sun. Express the number in standard form.​
hram777 [196]

Answer:

5.913000000 \times  {10}^{9}

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3 years ago
PicnicTech markets three versions of its Picnic Egg Boxes: the Golden Deluxe, containing 3 gold eggs and one plain egg; the Regu
viktelen [127]
I think im pritty sure its A

4 0
3 years ago
Subtract 3x + 2 from 8x + 9.​
kirill115 [55]

Answer:

5x+7

Step-by-step explanation:

Subtract like terms

(8x+9)-(3x+2)

8x-3x=5x

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5x+7 should be your answer I believe

3 0
2 years ago
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