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Nostrana [21]
2 years ago
10

A bookstore carries 70 magazines. 80% of the magazines are women's magazines. How many women's magazines

Mathematics
1 answer:
adell [148]2 years ago
8 0

Answer:

56

Step-by-step explanation:

If there are 70 total magazines, and 80% are womens, then you just multiply 70 * .80 = .56

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Saul decides to use the IQR to measure the spread of the data. Saul calculates the IQR of the data set to be . Saul asks Jasmine
Amiraneli [1.4K]

The question is incomplete. The compete question is :

Saul decides to use the IQR to measure the spread of data. Saul calculates the IQR of the data set to be 27. Saul asks Jasmine to check his work. Saul copies the data in numerical order from least to greatest for Jasmine. 25, 30, 50, 50, 50, 50, 56, n, 250. What is the value of n that will make the IQR of the data set equal to 27?

Solution :

The inter quartile range is being measured as : 3rd quartile - 1st quartile

The 1st quartile = 25% mark

The 3rd quartile = 75% mark

The data set as given in the question is :

25, 30, 50, 50, 50, 50, 56, n, 250

Therefore, the total number of the sample = 9

And the median is = 50

The median separates the given data sets into two equal halves-- that is the upper half and the lower half.

Let the middle of a lower half is the 1st quartile be $Q_1$

And the middle of a 2nd half is the 3rd quartile be $Q_3$

∴ $Q_1=\frac{30+50}{2}$

        $=40$

  $Q_3=\frac{56+n}{2}$

Now for the IQR of the data set to be equal to $27$,

$\frac{56+n}{2}-40=27$

$\frac{56+n}{2}=27+40$

$\frac{56+n}{2}=67$

$56 +n=134$

$n=134-56$

$n=78$

4 0
3 years ago
Determine which line is perpendicular to y = - 7/5x-2.​
tatuchka [14]

Answer:

y = 5/7 x  - 6

Step-by-step explanation:

For two lines to be perpendicular, the product of their slope must be -1

The slope of the given function is -7/5

Let the slope of the required function be m

m * -7/5 = -1

7/5 m = 1

7 = 5m

m = 5/7

The slope of the line perpendicular to the line is 5/7

The required equation (using any value of the y-intercept) is expressed as;

y = 5/7 x  - 6

Note that the y-intercept value was assumed and any value can be used

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For questions 1 - 8, list all the factors of the following numbers from least to greatest.
IrinaK [193]

Answer:

1. 1, 2, 5, 10

2. 1, 5, 25

3. 1, 2, 4, 8, 16, 32

4.  1, 3, 9, 27, 81

5. 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

6. 1, 2, 4, 5, 10, 20, 25, 50, 100

7. 1, 5, 25, 125

8. 1, 2, 4, 11, 22, 44

Step-by-step explanation:

Hope this helps!

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What is the solution to the equation √8x=√4+2x?
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