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Hoochie [10]
3 years ago
6

The local library has a childern section with pictures books and chapter books the ratio is 2:3 id thete are a total of 500 book

s in the childern section then how many chapters books are in the section
Mathematics
1 answer:
Anvisha [2.4K]3 years ago
5 0

Look at the ratio (2:3). You can see that the numbers of "ratio units" add up to 5, and that the total number of books is 100 times that value. Then each "ratio unit" stands for 100 books.

3 ratio units of chapter books mean there are 300 chapter books.

<h2><u>Mark as Brainliest</u></h2>

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Find the area of the parallelogram that has a base of 2 1/2 ft and a height of 1 1/4ft
Marina CMI [18]

Answer:

The area of the parallelogram is 3\frac{1}{8}ft^{2}

Step-by-step explanation:

Remember that a mixed fractions are composed for a whole number, a numerator and a denominator. For example in the mixed fraction 2\frac{1}{3}: 2 is the whole number, 1 is the numerator and 3 is the denominator.

If you want to convert to a improper fraction you need to multiply the whole number by the denominator and add to the numerator. The result will be the numerator of the improper fraction. The denominator remains the same.

2\frac{1}{3}=\frac{(2*3)+1}{3} =\frac{7}{3}

1. Convert the mixed fractions in the improper fraction type, as follows:

Base= 2\frac{1}{2}=\frac{5}{2} \\ \\Height= 1\frac{1}{4}=\frac{5}{4}

2. Replace the data in the equation of a parallelogram

Area= Base*Height

Area= Base*Height\\Area=\frac{5}{2}ft *\frac{5}{4}ft\\Solve...\\Area=\frac{25}{8}ft^{2}

3. Convert the improper fraction in a mixed fraction

Area=\frac{25}{8}ft^{2}=3\frac{1}{8}ft^{2}

The area of the parallelogram is 3\frac{1}{8}ft^{2}

5 0
3 years ago
A set of data with a mean 56 and a standard deviation 3.3 is normally distributed. find 2 standard deviations from the mean
Angelina_Jolie [31]

Answer:

To the right we have 62.6 while to the left we have 49.4

Step-by-step explanation:

A normal distribution is usually symmetric with respect to the mean. The mean of the distribution is also the mode as well as the median.

The general formula for points that lie n standard deviations away from the mean on either sides of the mean is given by the formula;

mean ± n(σ)

where σ is the standard deviation of the distribution;

Two standards deviations from the mean imply that n = 2;

56 ± 2(3.3)

56 ± 6.6

To the right we have 62.6 while to the left we have 49.4

7 0
3 years ago
Systematic random sampling is used to interveiw residents in 25% of 80 apartments in a building. The sampling interval would be
DedPeter [7]

The answer is A, A is the answer

8 0
4 years ago
Solve for x please ​
svlad2 [7]

Answer: 53°

Step-by-step explanation: If two parallel lines are cut by

a transversal, then same-side interior angles are supplementary.

So if we know one of our angles measures 127,

our other angle will measure 180 - 127, which is 53.

So x is 53 degrees.

Remember, whenever you have two parallel lines cut by a transversal,

same-side interior <'s are supp. or the sum of their measures is 180 degrees.

3 0
3 years ago
5 + 3 = 2/7p - 11<br><br> what is the value of p?
DENIUS [597]
5 + 3 = 2/7p - 115 + 3 = 2p/7 - 11
8 = 2p/7 - 11
8 + 11 = 2p/7
19 = 2p/7
19 × 7 = 2p
133 = 2p
133/2 = p
p = 133/2

The answer is: p = 133/2 or p = 66.5.
3 0
3 years ago
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