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3 years ago

If you are given a part-to-whole ratio, can you write part-to-part ratio? Explain

Mathematics

1 answer:

stealth61 [152]3 years ago

8 0

There are 2 types of ratios: Part-to-Wholes, and Part-to-Part ratios.

Part-to-part ratios show the relationship between the two groups.

Lets say theres 10 fruits in a fruit bowl.

If you have 3 apples, and 7 oranges, then the ratio is 3:7 as the part-to-part ratio. But the part-to-whole ratio would be either 3:10 ( for apples) or 7:10 (for oranges)

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The town of Haverford just bought land to make a new park. The land is in the shape of a rectangle that is 2/3 of a mile wide an

frosja888 [35]

Answer:

Step-by-step explanation:

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3 years ago

Four students sold lemonade after school. They had five $5 bills, two $10 bills, seven $1 bills and four dimes. They split the m

garik1379 [7]

They each got 4 dollars because all the $ added up will be 16 and it divided by the 4 kids 16 •|• 4= 4

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3 years ago

Solve the following recurrence relation: <img src="https://tex.z-dn.net/?f=A_%7Bn%7D%3Da_%7Bn-1%7D%2Bn%3B%20a_%7B1%7D%20%3D

-Dominant- [34]

By iteratively substituting, we have

$a_n = a_{n-1} + n$

$a_{n-1} = a_{n-2} + (n - 1) \implies a_n = a_{n-2} + n + (n - 1)$

$a_{n-2} = a_{n-3} + (n - 2) \implies a_n = a_{n-3} + n + (n - 1) + (n - 2)$

and the pattern continues down to the first term $a_1=0$ ,

$a_n = a_{n - (n - 1)} + n + (n - 1) + (n - 2) + \cdots + (n - (n - 2))$

$\implies a_n = a_1 + \displaystyle \sum_{k=0}^{n-2} (n - k)$

$\implies a_n = \displaystyle n \sum_{k=0}^{n-2} 1 - \sum_{k=0}^{n-2} k$

Recall the formulas

$\displaystyle \sum_{n=1}^N 1 = N$

$\displaystyle \sum_{n=1}^N n = \frac{N(N+1)}2$

It follows that

$a_n = n (n - 2) - \dfrac{(n-2)(n-1)}2$

$\implies a_n = \dfrac12 n^2 + \dfrac12 n - 1$

$\implies \boxed{a_n = \dfrac{(n+2)(n-1)}2}$

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2 years ago

(2.5×10^−10)(7×10^−6)

Nataly [62]

(2.5×10^−10)(7×10^−6)
= (2.5 x 7) (10^−10 x 10^−6)
= 17.5 x 10^-16
= 1.75 x 10^-15

answer
B. 1.75×10^−15

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3 years ago

4 pounds of grapes cost $11.52. what is the unit rate?

Zepler [3.9K]

Answer: 2.88/1

Step-by-step explanation:

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3 years ago