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3 years ago

ILL MARK BRAINIEST IF YOU CAN DO THIS RIGHT!!!

Mathematics

1 answer:

Bumek [7]3 years ago

5 0

Answer: Slope: -1/2

Step-by-step explanation: To find slope take 2 points that lie on the line and use this formula to solve: I will use (0, -2) and (2, -3) to solve

↑ ↑ ↑ ↑

y2 - y1 x1 y1 x2 y2

-----------

x2 - x1

So, for this question, substitute the x and y values from the points above to solve.

-3 - (-2)

----------- = - 1/2

2 - 0

Hope this helped. :)

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One sample has a mean of and a second sample has a mean of . The two samples are combined into a single set of scores. What is t

Murrr4er [49]

Answer:

a) For this case we can use the definition of weighted average given by:

$M = \frac{ \bar X_1 n_1 + \bar X_2 n_2}{n_1 +n_2}$

And if we replace the values given we have:

$M = \frac{8*4 + 16*4}{4+4}= 12$

b) $M = \frac{8*3 + 16*5}{3+5}= 13$

c) $M = \frac{8*5 + 16*3}{5+3}= 11$

Step-by-step explanation:

Assuming the following question: "One sample has a mean of M=8 and a second sample has a mean of M=16 . The two samples are combined into a single set of scores.

a) What is the mean for the combined set if both of the original samples have n=4 scores "

For this case we can use the definition of weighted average given by:

$M = \frac{ \bar X_1 n_1 + \bar X_2 n_2}{n_1 +n_2}$

And if we replace the values given we have:

$M = \frac{8*4 + 16*4}{4+4}= 12$

b) what is the mean for the combined set if the first sample has n=3 and the second sample has n=5

Using the definition we have:

$M = \frac{8*3 + 16*5}{3+5}= 13$

c) what is the mean for the combined set if the first sample has n=5 and the second sample has n=3

Using the definition we have:

$M = \frac{8*5 + 16*3}{5+3}= 11$

7 0

3 years ago

Sarah claims that when you divide, the number you are dividing always gets smaller. John says this is not true. Who is correct?

inn [45]

Answer:

Step-by-step explanation:

John is correct as Dividing does not always gets the quantity smaller for example if we divide 4 by 0.5

We get

4/0.5= 8

6 0

3 years ago

Prove that the point joining the midpoint of any side of a triangle is half the third side

Nataly [62]

Answer:

We conclude that the line joining the mid-point of two sides of a triangle is equal to half the length of the third side. The converse of this theorem states: If a line is drawn through the mid-point of a side of a triangle parallel to the second side, it will bisect the third side.

Hope this helped you! :)

5 0

3 years ago

PLEASE HELP WILL GIVE TWENTY POINTS Which is the best approximation for the measure of angle ABC?

Shkiper50 [21]

Cos(x) = BC/AB = 10.5/20 = 0.525 ⇒ x = 58.3°

3 0

3 years ago

What is the value of X? x/5+6=36 X=?

Nonamiya [84]

STEP 1. x/5+6= 36
STEP 2. x/5 = 30
STEP TRES x= 150

6 0

3 years ago