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8_murik_8 [283]
3 years ago
6

Why is it helpful to find the mean of the data set?

Mathematics
1 answer:
HACTEHA [7]3 years ago
7 0
The mean of a set of data is the average, so when writing a conclusion or justifying a solution, instead of listing all your data you can say "the average of the data collected was _____"
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Helpppppppp plizzzzzzzzzzzzz
Margarita [4]
Take the equation: y = 520 + 14x and put each value from the table in for x and y.  

100 = 520 + 14 * -30
100 = 520 + -420
100 = 100   When we get an answer like this where the numbers on both sides of the equation match, we know that this (x,y) point is a part of the solution to the function.

So, you would work through each line in the table.  If they are all like the one above, the answer is Yes.  If not, it is no.
7 0
3 years ago
Which of the following expressions is not equivalent to <br> 2(b+​8)?
maksim [4K]

the awser is (-2)(8 + 6) + (-3)

7 0
3 years ago
Please solve the eqution<br> Cos4x + cos2x - 2 =0
horrorfan [7]

cos4x = cos2x

We know that:

cos2x = 1-2cos^2 x

==> cos4x = 1-2cos^2 (2x)

Now substitute:

==> 1-2cos^2 (2x) = cos2x

==> 2cos^2 (2x) + cos2x - 1 = 0

Now factor:

==> (2cos2x -1)(cos2x + 1) = 0

==> 2cos2x -1 = 0 ==> cos2x =1/2 ==> 2x= pi/3

==> x1= pi/6 , 7pi/6

==> x1= pi/6 + 2npi

==> x2= 7pi/6 + 2npi

==> cos2x = -1 ==> 2x= pi ==> x3 = pi/2 + 2npi.

<span>==> x= { pi/6+2npi, 7pi/6+2npi, pi/2+2npi}</span>

6 0
3 years ago
What is the solution to -2(8x - 4) &lt; 2x + 5?
kumpel [21]

Answer:

x = - 10

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
F. Please answer this as soon as possible.
Liono4ka [1.6K]

Answer:

-12

Step-by-step explanation:

Convert the mixed number to an improper fraction.

-2\frac{2}{3} = -\frac{8}{3}

To divide, just multiply by the reciprocal.

So -2\frac{2}{3} ÷ \frac{2}{9} becomes -\frac{8}{3} ÷

Now you can multiply straight across.

-\frac{8}{3} × \frac{9}{2} = -\frac{72}{6}

And simplify.

-\frac{72}{6} = -12

Please mark as Brainliest! :)

7 0
3 years ago
Read 2 more answers
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