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3 years ago

9

What are the four quadrants for graphing ??????? Plsssssssssssssss help me

2 answers:

MissTica3 years ago

8 0

Answer:

for a straight line graph,pick two points on the graph - The gradient of the line =(change in y-coordinate)/change in x-coordinate)You can,also use dis to find the equation of the line Since the line crosses the y-axis when y=3 , the equation of the graph is y=1/2x +3

stira [4]3 years ago

5 0

Answer: its in the pic

Step-by-step explanation:

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A new type of pump can drain a certain pool in 8 hours. An older pump can drain the pool in 12 hours. How long will it take both

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Answer:

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Step-by-step explanation:

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3 years ago

Solve the following system by Gauss-Jordan elimination.

topjm [15]

9514 1404 393

Answer:

x1 = 1/2 + 1/2t

x2 = 4 -2t

x3 = t

Step-by-step explanation:

Your answer is correct as far as it goes. The values of x1 and x2 also need to be expressed in terms of t.

x1 = 1/2 + 1/2t

x2 = 4 -2t

x3 = t

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Ming reads 1/4 of a book each night. How long will it take her to read 3/4 of the book?

luda_lava [24]

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3 years ago

Read 2 more answers

What is 4,-5 reflected across the x axis

Anestetic [448]

Step-by-step explanation:

Reflection on x-axis;

A(4,-5)=A'(4,5)

8 0

3 years ago

Listed below are foot lengths in inches for 11 randomly selected people taken in 1988. Find the range, variance, and standard de

soldi70 [24.7K]

Answer:

$Range= Max-Min= 10.2-8.7=1.5 inches$

$s =\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And if we replace we got $s = 0.50 inches$

$s^2 = 0.503^2 = 0.25 in^2$

D. The statistics are representative because they are taken from a random sample

Step-by-step explanation:

For this case we have the following data:

9.9 8.7 10.1 9.2 9.2 9.9 10.1 9.4 9.1 9.3 10.2

The data was colledted from a random sample of people selected in 1988.

We can order the dataset on increasing way and we got:

8.7 9.1 9.2 9.2 9.3 9.4 9.9 9.9 10.1 10.1 10.2

The range is defined as $Range= Max-Min= 10.2-8.7=1.5 inches$

The mean is defined as:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}= 9.555 inches$

The standard deviation can be calculated with the following formula:

$s =\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And if we replace we got $s = 0.50 inches$

The sample variance would be just the deviation squared:

$s^2 = 0.503^2 = 0.25 in^2$

And since the data comes from a random sample then is representative fo the population data in 1988. So then the best answer for this case would be:

D. The statistics are representative because they are taken from a random sample

3 0

3 years ago