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3 years ago

Drag the expression into the boxes to correctly complete the table

Mathematics

1 answer:

bazaltina [42]3 years ago

3 0

Answer:

2nd and 3rd are polynomials, rest arent

Step-by-step explanation:

Polynomial has to have no ||s, sqrts, or variables in denominator of fraction

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Which shows how to find the value of this expression when x=-2 and y=5 (3x^3y^-2)^2??

lidiya [134]

Answer:

(3×-2^3×5^-2)^2

Step-by-step explanation:

I think this is it I'm not sure sorry if it's not I tried my best to help you.

7 0

3 years ago

Questions 2-7 will all be in regards to this data set:Observation X Y1 20 302 23 353 28 404 26 385 24 376 32 457 35 508 24 349 3

Tomtit [17]

Answer:

r =0.4437

Step-by-step explanation:

We have the follwoing dataset:

X: 20,23,53,4,24,32,35,24,31,23

Y: 30,35,40,38,37,45,50,34,42,32

n=10

The correlation coefficient is a "statistical measure that calculates the strength of the relationship between the relative movements of two variables". It's denoted by r and its always between -1 and 1.

And in order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

For our case we have this:

n=10 $\sum x = 269, \sum y = 383, \sum xy = 10609, \sum x^2 =8645, \sum y^2 =15007$

Th excel figure attached shows the calculations for each sum.

$r=\frac{10(10609)-(269)(383)}{\sqrt{[10(8645) -(269)^2][10(15007) -(383)^2]}}=0.4437$

So then the correlation coefficient would be r =0.4437

3 0

3 years ago

Find the missing side length

DochEvi [55]

Tan=o/adj
Tan=60/b
B=60/tan(68)
I don't have a calculator on me but you should be able to do it from there

3 0

3 years ago

Mr. Jacobs is going to make a histogram of the test scores from the last math test he gave. He plans to first organize the data

lukranit [14]

The stem and leaf plot will look like:
6 | 1 5 8 - 3 scores
7 | 1 7 7 9 - 4 scores
8 | 2 3 4 5 7 9 - 6 scores
9 | 0 1 4 7 9 - 1 score
To total up the number of students who scored less than 90, we have 3 under 60-69, 4 under 70-79, and 6 under 80-89, so this is 3 + 4 + 6. This is the third choice.

8 0

3 years ago

A is the point with coordinates (5,9) B is the point with coordinates (d,17) The line AB has gradient 4 Work out the value of d

yarga [219]

Answer:

d=9

Step-by-step explanation:

The gradient of straight line is given by

$m=\frac{y_2-y_1}{x_2-x_1}$