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3 years ago

Halpoppppppppppp pppp

Mathematics

1 answer:

PolarNik [594]3 years ago

3 0

Question 2: peaceful protests without violence

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Write the series using summation notation. Then find the sum of the series.

ivolga24 [154]

Hello, please consider the following.

$\displaystyle 1+2+3+...+12=\sum_{k=1}^{k=12} {k}=\dfrac{12*13}{2}=6*13=78$

For the second we will need to put on the same denominator.

$\displaystyle \dfrac{1}{2}+\dfrac{1}{4}+...+\dfrac{1}{14}=\sum_{k=1}^{k=7} {\dfrac{1}{2k}}\\\\=\dfrac{1}{2}\dfrac{420+210+140+105+84+70+60}{5*7*3*2*2}\\\\=\dfrac{1}{2}\dfrac{1089}{420}\\\\=\dfrac{1089}{840}=1.296429...$

Thank you.

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3 years ago

What is 8/25 as a decimal representation and as a percent representation please answer thank you

Sholpan [36]

Answer:

decimal: 0.32 percent: 32%

Step-by-step explanation:

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3 years ago

A video games on sale for $56. The original price of the video game was $70. What percent of the original price is the sale pric

Sloan [31]

Answer:

20 %

Step-by-step explanation:

70 X 0.20% = 56

7 0

3 years ago

Corbin recorded the amount of money spent, in dollars, on food per meal at two different restaurants. He rounded the amounts to

Ronch [10]

Answer:

It c i got a 100

Step-by-step explanation:

on E d g e n u i t y

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3 years ago

Amanda and Fred are sister and brother. Amanda has twice as many sisters as brothers, and Fred has five times as many sisters as

pav-90 [236]

Answer:

In this family there are 5 girls and 2 boys

Step-by-step explanation:

Fred has five times as many sisters as brothers, so at least he has five sisters.

1. Let's suppose Fred has just one brother, in this case he would have five sisters (including Amanda). The condition that Fred has five times as many sisters as brothers is fufilled.

2. If Fred has one brother, it means that Amanda has two brothers

3. If Fred has five sisters (including Amanda), it means that Amanda has four sisters.

4. If Amanda has two brothers and four sisters, the condition that she has twice as many sisters as brothers is fufilled.

5. Then, in both cases, there are 5 girls and 2 boys:

Fred + 1 brother + 5 sisters = 2 boys, 5 girls

Amanda + 2 brothers + 4 sisters = 2 boys, 5 girls

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3 years ago