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AveGali [126]
3 years ago
10

What is the factorization of 49b^2-81

Mathematics
1 answer:
Zinaida [17]3 years ago
3 0

Answer:  The factorisation of 49b^2 - 81 is (7b - 9)(7b + 9). This is because 49 and 81 are the squares of 7 and 9 respectively, so these must be multiplied together. b^2 is b x b. Finally, it must be -9 and +9 to make -81, because when the signs are the same the result is a positive number.

Read more on Brainly.com - brainly.com/question/1486049#readmore

Step-by-step explanation:

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A network provider investigates the load of its network. The number of concurrent users is recorded at fifty locations (thousand
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Answer:

see explaination

Step-by-step explanation:

Using the formulla that

sum of terms number of terms sample mean -

Gives the sample mean as \mu=17.954

Now varaince is given by

s^2=\frac{1}{50-1}\sum_{i=1}^{49}(x_i-19.954)^2=9.97

and the standard deviation is s=\sqrt{9.97}=3.16

b) The standard error is given by

\frac{s}{\sqrt{n-1}}=\frac{3.16}{\sqrt{49}}=0.45

c) For the given data we have the least number in the sample is 12.0 and the greatest number in the sample is 24.1

Q_1=15.83, \mathrm{Median}=17.55 and Q_3=19.88

d) Since the interquartile range is Q_3-Q_1=19.88-15.83=4.05

Now the outlier is a number which is greater than 19.88+1.5(4.05)=25.96

or a number which is less than 15.83-1.5(4.05)=9.76

As there is no such number so the given sample has no outliers

5 0
3 years ago
A medical school admits 86 new applicants every year, let y represent the number of years and a represent the total of admitted
kkurt [141]

Answer:

a = 86y

Step-by-step explanation:

Given:

Number of applicants per year = 86

Find:

Equation represent total applicants

Computation:

Assume;

Total number of years = y

Total number of applicants = a

So,

Total number of applicants = Number of applicants per year x Total number of years

a = 86 x y

a = 86y

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3 years ago
Solve for x.<br> Please help
Andrei [34K]

Answer:

x=3

Step-by-step explanation:

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9+3x= 5x+3

6=2x

x=3

8 0
3 years ago
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