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3 years ago

Work out the equation of the line which has a gradient of -2 and passes through the point (1,7)

Mathematics

1 answer:

Ilya [14]3 years ago

5 0

point slope form of a line

y-y1 = m(x-x1)

y-7 = -2 (x-1)

if you want it in slope intercept form

y-7 = -2x +2

add 7 to each side

y = -2x +9

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The following data was collected from 10 visitors to Disneyland. A researcher stood at the entrance gate and interviewed the fir

Ludmilka [50]

Answer:

The standard deviation for the sample of 10 families is 1.68 (Rounding to two decimal places)

Step-by-step explanation:

1. The first step to calculate the standard deviation is to find out the mean, this way:

Mean = (1 + 1 + 2 + 2 + 2 + 2 + 3 + 3 + 4 + 7)/10

Mean = 27/10 = 2.7

2. Now we calculate the variance, this way:

Variance = [(1 - 2.7)²+(1 - 2.7)²+(2 - 2.7)²+(2- 2.7)²+(2 - 2.7)²+(2 - 2.7)²+(3- 2.7)²+(3 - 2.7)²+(4 - 2.7)²+(7- 2.7)²]/10

Variance = [2.89 + 2.89 + 0.49 + 0.49 + 0.49 + 0.49 + 0.09 + 0.09 + 1.69 + 18.49]/10

Variance = 28.1/10 = 2.81

3. Finally we calculate the standard deviation, this way:

Variance = Standard deviation²

√Variance = Standard deviation

√2.81 = Standard deviation

Standard deviation = 1.68 (Rounding to two decimal places)

6 0

3 years ago

Find the circumference of an 3.3 inch circle

weeeeeb [17]

Answer:

I hope that this can help you

5 0

3 years ago

Read 2 more answers

Log(100) = log(400) - log(4) "

Luden [163]

When working with logarithms, remember that a subtraction sign means you can divide.
log(400) - log(4) can be turned into log(400/4), which is further simplified to log(100).

5 0

3 years ago

I know this is easy but what is 799 divided by 7

Mademuasel [1]

114.14

hope this helps.

3 0

3 years ago

Read 2 more answers

What is the expanded notation of 12.065?

Evgesh-ka [11]

(12+1)+ (0/10)+(6/100)+(5/1000)=12.065

Hope this helps u!

8 0

3 years ago