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2 years ago

7 is 30% of what number

Mathematics

1 answer:

PSYCHO15rus [73]2 years ago

5 0

It's 30% of 23.33333 rep.

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23% of 75 is what number?

Nonamiya [84]

Answer:

17.25 or 69/4 as a fraction

Step-by-step explanation:

use the desmos scientific calculator :) hope this helped

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2 years ago

Lewis needed to find the difference in lengths between the hypotenuse and the longest leg of this triangle. His work is shown be

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Step-by-step explanation:

Edge2020

im not gonna explain cuz some other guy got it wrong and im just answering for anyone who needs it

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2 years ago

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you have one penny 1 nickel 1 dime and 1 quarter you select two coins at random. what is the probability that you will have exac

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Answer:

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Step-by-step explanation:

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2 years ago

Write the following sum using summation notation -2/5+3/6-4/7........11/14

horrorfan [7]

Answer:

$\sum_{n=1}^{10}(-1)^n\left ( \frac{n+1}{n+4} \right )$

Step-by-step explanation:

Given: $\frac{-2}{5}+\frac{3}{6}-\frac{4}{7}+...+\frac{11}{14}$

To write: the given expression using summation notation

Solution:

Summation notation helps to write a long sum as a single expression.

In the summation notation, the variable $\sum$ is called the index of summation.

Let $x_1,x_2,x_3,...,x_n$ denote a set of n numbers.

Then in summation notation,

$x_1+x_2+x_3+...+x_n=\sum_{i=1}^{n}x_i$

$\frac{-2}{5}=(-1)^1\left ( \frac{1+1}{1+4} \right )\\\frac{3}{6}=(-1)^2\left ( \frac{2+1}{2+4} \right )\\\frac{-4}{7}=(-1)^3\left ( \frac{3+1}{3+4} \right )\\.\\.\\.\\\frac{11}{14}=(-1)^10\left ( \frac{10+1}{10+4} \right )\\\therefore \frac{-2}{5}+\frac{3}{6}-\frac{4}{7}+...+\frac{11}{14}=\sum_{n=1}^{10}(-1)^n\left ( \frac{n+1}{n+4} \right )$

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2 years ago

1/3 + (-7/4) please help

galina1969 [7]

Answer:

-1.41666666667

Step-by-step explanation:

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2 years ago

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