2 years ago

What is 21n + 15 + n - 2 simplified ?

Mathematics

1 answer:

docker41 [41]2 years ago

4 0

Answer:

=22n+13

Let's simplify step-by-step:

21n+15+n−2

=21n+15+n+−2

Combine Like Terms:

=21n+15+n+−2

=(21n+n)+(15+−2)

=22n+13

Answer:

=22n+13

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Ten plus 6 times a number n is equal to 5 less than the number n.

Gala2k [10]

Answer:

Step-by-step explanation:

10+6n=n-5

6n-n=-5-10

5n=-15

n=-3

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3 years ago

Which of the choices below is not a possible correlation coefficient?

fiasKO [112]

Answer:

The condition for r is the following:

$-1 \leq r \leq 1$

And for this case if we analyze the options the only impossible value is given by:

1.0528

Because this value is higher than 1 and not satisfy the general limits for r

Step-by-step explanation:

The correlation coefficient is a measure of dispersion and is a value between -1 and 1, and is defined as:

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

The condition for r is the following:

$-1 \leq r \leq 1$

And for this case if we analyze the options the only impossible value is given by:

1.0528

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3 years ago

What is the value of y?

scZoUnD [109]

All angles in triangle inside add up to 180
so

the angles are y, 79,37
therefor
y+79+37=180
solvde for y
y+79+37=180
add
y+116=180
subtract 116 from ot hsides
y=64

angle y=64 degrees

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3 years ago

Which equation shows how (–10, 8) can be used to write the equation of this line in point-slope form?

alex41 [277]

If you plug in the # the only one that is correct is y-8=-0.2(x+10)

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3 years ago

The listed weight of a steel beam is 80 pounds. An engineer weighs the beam in his shop and records a weight of 86.5 pound. What

bazaltina [42]

Answer:

8.125% is the answer

Step-by-step explanation:

steps in picture, to help you better understand

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2 years ago