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garri49 [273]
3 years ago
15

A fraction changes from​ 3/4 to​ 4/10. The numerator changed by​ _____%; the denominator changed by​ _____%; the value of the fr

action changed by approximately​ _____%.
Mathematics
1 answer:
Korvikt [17]3 years ago
4 0
The change from 3/4 to 4/10 is found by obtaining and applying the LCD:

15/20 to 8/20 is a negative change, and the amount of the change was -7/20.

We compare this result to the original value, 15/20, to obtain the percentage change in the fraction:

   -7/20
----------- = -7/15 = -0.467  =>  -46.7%
   15/20
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Which formula represents this sequence 2,8,14...?
Vikentia [17]

Answer:

a_{n} = 6n - 4

Step-by-step explanation:

There is a common difference between consecutive terms in the sequence, that is

8 - 2 = 14 - 8 = 6

This indicates the sequence is arithmetic with n th term

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 2 and d = 6 , thus

a_{n} = 2 + 6(n - 1) = 2 + 6n - 6 = 6n - 4

Thus the formula representing the sequence is

a_{n} = 6n - 4

5 0
3 years ago
What is the sum of the two largest numbers in the list
Dmitriy789 [7]

Answer:

\frac{25}{39}

Step-by-step explanation:

The given numbers are

\frac 13,~\frac 27,~\frac 3{10},~\frac 4{13},~\frac 5{17}

We need to find the sum of the two largest numbers in the list.

The values of each number are

\frac{1}{3}=0.33..

\frac{2}{7}\approx 0.286

\frac{3}{10}=0.3

\frac{4}{13}\approx 0.308

\frac{5}{17}\approx 0.294

Using these we can say that

\frac{2}{7}

It means two largest numbers in the list are \frac{4}{13}\text{ and } \frac{1}{3}.

The sum of these two number is

Sum=\frac{4}{13}+\frac{1}{3}

Sum=\frac{4\cdot 3+1\cdot 13}{39}

Sum=\frac{25}{39}

Therefore, the sum of the two largest numbers in the list is \frac{25}{39}.

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Answer:

I'd use A = πr^2

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