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3 years ago

please help will get rewared with brainliest ad 5 stars if correct answer please help struggling in school rn

Mathematics

1 answer:

serg [7]3 years ago

8 0

Answer: Yes that I correct.

Step-by-step explanation:

Because 25 times 4 is 100 and what you do to the bottom you have to do to the top so 7 times 4 is 28

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In how many ways you can put 20 books on 50 shelves so that there is not more than one book on a shelf?

elena-s [515]

Answer:

The other answer I saw is the same way that I used to explain in my class as well. But, there's an alternative way to reach the answer as well

First thing that we should know is that if there are 'n' units kept in a row, then there are 'n+1' gaps generated by them. So, what we should understand is that when there is no item there is 1 gap, when there is one item there are 2 gaps, and so on.

Let us use that concept here, with a small variation: the 5 shelves are 5 initial gaps. The first book has 5 choices (5 initial gaps) to go to. Once we have placed this book, there are now 6 gaps on which the 2nd book can be placed. After the 2nd book is placed, there are 7 gaps in which 3rd book can be placed, and so on.

So, the total arrangements will be = 5*6*7*...24 [as there are 20 books] = 24P20

8 0

3 years ago

Sarah scored an 8/10 on the spelling test and Jonathan scored 75% of Sarah’s score on the spelling test. What is the score of Jo

Fudgin [204]

$\frac{3}{5}$ is the score of Jonathan.

<h3 /><h3>What is percentage?</h3>

Percentage, which may also be referred to as percent, is a fraction of a number out of 100%. Percentage means "per 100" and denotes a piece of a total amount.

To calculate the percentage , Use the percentage formula:

$X * \frac{Percentage}{100} = Y$

According to the question:

Sarah scored on the spelling test = $\frac{8}{10}$

Jonathan scored = 75%

By formulating both the values;

$\frac{8}{10} * \frac{75}{100}$

= $\frac{3}{5}$

Therefore , $\frac{3}{5}$ is the score of Jonathan.

Learn more about percentage here:

brainly.com/question/13450942

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8 0

2 years ago

Please help me guys I will give the first person who answer a Brilliant

Stolb23 [73]

Answer:

2 3/4+(2 3/4 / 2)=t

Step-by-step explanation:

IM sure this is right

4 0

3 years ago

Credit sales are collected as follows:65 percent in the month of the sale.25 percent in the month after the sale.10 percent in t

Vitek1552 [10]

Answer:

Step-by-step explanation:

a) November sales = (Total Uncollected Sales - Uncollected Sales from December) / Collection rate after two months

= ($121,100 - $87,300) / 0.20

November sales = $169, 000.00

b) December sales = Uncollected sales from December / Collection rate of the previous month sales,

Therefore: December sales = $87,300 / 0.45 = $194,000

December sales = $194,000.00

c) Each month's collection for the company are:

Collections for ech month = 0.20(Sales from 2 months ago) + 0.25(Last month's sales) + 0.55 (Current sales)

January collections = 0.20($169000.00) + 0.25($194,000.00) + 0.55($132,000)

January collections = $154,900.00

February collections = 0.20($194,000.00) + 0.25($132,000) + 0.55($149,000)

February collections = $153,750.00

March collections = 0.20($132,000) + 0.25($149,000) + 0.55($164,000)

March collections = $153,850.00

4 0

4 years ago

Find the length of the function over the given interval. y = 3x from x = 0 to x = 2

olganol [36]

The length of the function y = 3x over the given interval [0, 2] is 3.2 units

For given question,

We have been given a function y = 3x

We need to find the length of the function on the interval x = 0 to x = 2.

Let f(x) = 3x where f(x) = y

We have f'(x) = 3, so [f'(x)]² = 9.

Then the arc length is given by,

$\int\limits^a_b {\sqrt{1+[f'(x)]^2} } \, dx\\\\= \int\limits^2_0 {\sqrt{1+9} }\, dx\\\\=\sqrt{10}\\\\ =3.2$

This means, the arc length is 3.2 units.

Therefore, the length of the function y = 3x over the given interval [0, 2] is 3.2 units

Learn more about the arc length here:

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3 0

2 years ago