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3 years ago

7

What can i do to be brainiest

2 answers:

grigory [225]3 years ago

7 0

You can answer some questions that say (PLEASE ANSWER I WILL GIVE YOU BRAINIEST!!!!!!!) it usually happens if you answer it first ;D

Natali [406]3 years ago

3 0

Answer:

if you want to be placed in the brainiest users chart, answer alot of questions with the correct answers, provide detailed explanations and yup thats pretty much it :)

Step-by-step explanation:

You might be interested in

It’d be a great help if someone could help me with the 4 practice problems (-,b,c & d)

natima [27]

Answer:

idk thats tough

Step-by-step explanation:

4 0

3 years ago

Suppose that you were not given the sample mean and sample standard deviation and instead you were given a list of data for the

Troyanec [42]

Answer:

So, the sample mean is 31.3.

So, the sample standard deviation is 6.98.

Step-by-step explanation:

We have a list of data for the speeds (in miles per hour) of the 20 vehicles. So, N=20.

We calculate the sample mean :

$\mu=\frac{19 +19 +22 +24 +25 +27 +28+ 37 +35 +30+ 37+ 36+ 39+ 40+ 43+ 30+ 31+ 36+ 33+ 35}{20}\\\\\mu=\frac{626}{20}\\\\\mu=31.3$

So, the sample mean is 31.3.

We use the formula for a sample standard deviation:

$\sigma=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\mu)^2}$

Now, we calculate the sum

$\sum_{i=1}^{20}(x_i-31.3)^2=(19-31.3)^2+(19-31.3)^2+(22-31.3)^2+(24-31.3)^2+(25-31.3)^2+(27-31.3)^2+(28-31.3)^2+(37-31.3)^2+(35-31.3)^2+(30-31.3)^2+(37-31.3)^2+(36-31.3)^2+(39-31.3)^2+(40-31.3)^2+(43-31.3)^2+(30-31.3)^2+(31-31.3)^2+(36-31.3)^2+(33-31.3)^2+(35-31.3)^2\\\\\sum_{i=1}^{20}(x_i-31.3})^2=926.2\\$

Therefore, we get

$\sigma=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\mu)^2}\\\\\sigma=\sqrt{\frac{1}{19}\cdot926.2}\\\\\sigma=6.98$

So, the sample standard deviation is 6.98.

3 0

3 years ago

Two samples were taken of fish caught on Small Lake and are shown in the table below. It is estimated that the Small Lake fish p

frez [133]

Answer:

80

Step-by-step explanation:

Took the test

4 0

4 years ago

Read 2 more answers

If the equation below is solved by graphing, which statement is true? log (6 x + 10) = log 1/2 x

kicyunya [14]

The solution to the given expression is x = -20/11

<h3>
What are logarithmic functions?</h3>

Logarithmic function are inverse of exponential functions. Given the equation below;

log (6 x + 10) = log 1/2 x

In order to determine the solution to the given logarithmic equation, we will first have to cancel the logarithm on both sides to have

6x + 10 = 1/2x

Collect the like terms

6x - 1/2x = 0 - 10

Find the LCD

12x-x/2 = -10
11x/2 = -10

Cross multiply

11x = -2 * 10

11x = -20

Divide both sides by 11

11x/11 = -20/11

x = -20/11

Hence the solution to the given expression is x = -20/11

Learn more on log functions and graph here: brainly.com/question/2086094

#SPJ1

6 0

2 years ago

Usha thinks that the area of the development will be greater than the total area of 50 football pitches.

tangare [24]

Answer:

Usha is correct

Step-by-step explanation:

See attachment

Given

Dimension of the development

$Height = \frac{1}{2}\ mile$

$Base = \frac{1}{2}\ mile$

Dimension of a football field

$Length = 100m$

$Width = 50m$

First, we calculate the area of the development.

Because it is triangular in shape, the area is:

$Area = \frac{1}{2} * Height * Base$

$Area = \frac{1}{2} * \frac{1}{2}mile * \frac{1}{2}mile$

Convert mile to meter

$Area = \frac{1}{2} * \frac{1}{2}* 1600m * \frac{1}{2} * 1600m$

$Area = \frac{1}{2} * 800m * 800m$

$Area = 400m * 800m$

$Area = 320000m^2$

The area of 50 football pitch is then calculated as:

$Area = 50 * Length * Width$

$Area = 50 * 100m * 50m$

$Area = 250000m^2$

By comparison:

$320000 > 250000$

<em>Hence, Usha's thought is correct</em>

5 0

3 years ago