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3 years ago

Help pls dont answer if you don’t know also I’ll give brainliest

Mathematics

1 answer:

BartSMP [9]3 years ago

4 0

Well, what are the like terms?

5x and 3x

-17 and 21

so combine them and what do you get?

I don't what to just give you the answer I want to also help you.

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The area of circle B is 4 times greater than the area of circle A. If the radius of circle A is 13 meters, what is the radius of

Snezhnost [94]

It’s would be D.)52 meters because if B is 4 times A and A’s 13 13*4=52

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3 years ago

Will the following measurements create a triangle? 25 25 130

WINSTONCH [101]

Answer:

if those measurements are degrees, then yes. If those measurements are the side lengths, then no.

Step-by-step explanation:

all angles on a triangle must had up to 180 degrees.

the two smaller sides of the triangle must add up to be larger than the largest side.

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3 years ago

Let X represent the SAT score of an entering freshman at University X. The random variable X is shown to have a N(1200, 90) dist

Lelechka [254]

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4 years ago

The value of the coefficient of correlation ( r) a. can never be equal to the value of the coefficient of determination (r2). b.

gulaghasi [49]

Answer:

d. can be equal to the value of the coefficient of determination (r2).

True on the special case when r =1 we have that $r^2 = 1$

Step-by-step explanation:

We need to remember that the correlation coefficient is a measure to analyze the goodness of fit for a model and is given by:

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

The determination coefficient is given by $R= r^2$

Let's analyze one by one the possible options:

a. can never be equal to the value of the coefficient of determination (r2).

False if r = 1 then $r^2 = 1$

b. is always larger than the value of the coefficient of determination (r2).

False not always if r= 1 we have that $r^2 =1$ and we don't satisfy the condition

c. is always smaller than the value of the coefficient of determination (r2).

False again if r =1 then we have $r^2 = 1$ and we don't satisfy the condition

d. can be equal to the value of the coefficient of determination (r2).

True on the special case when r =1 we have that $r^2 = 1$

7 0

3 years ago

_x(-26) = 26 what is the first part

Aliun [14]

Answer:

Step-by-step explanation:

Two negatives create a positive.

6 0

3 years ago

Read 2 more answers