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notka56 [123]
2 years ago
10

Pls help I need it today!!!! 80 points!!!!! Part 1: Looking at the data plots, which test do you think the students scored bette

r on? Do you think
has more variation than the other or is the variation about the same for both tests? Use complete se
answer and explain your reasoning.
Part 2: Calculate the mean (rounded to the nearest whole number) and mean absolute deviation for t
Part 3: Do your results from part B prove or disprove your hypotheses from part A? Use complete ser
answer and explain your reasoning.
MacBook Air
Mathematics
1 answer:
aliya0001 [1]2 years ago
3 0
Where are the data points?
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Add these polynomials and simplify. Enter your response in standers form (x^4-9+5x^7) + ( 5x -10 +3x^4 - 2x^2)
Natali [406]

Answer:

5x^7 + 4x^4 - 2x^2 + 5x - 19

Step-by-step explanation:

Start by copying 5x -10 +3x^4 - 2x^2 here.  Next, add x^4 to +3x^4, -9 to -10, and 5x^7:

5x - 10 +3x^4 - 2x^2

     -  9  +x^4               + 5x^7

-----------------------------------------

5x - 19 + 4x^4 - 2x^2 + 5x^7

Now rearrange these terms in descending order by powers of x:

5x^7 + 4x^4 - 2x^2 + 5x - 19   (answer)

4 0
2 years ago
Read 2 more answers
Find the angle between the given vectors to the nearest degree.
konstantin123 [22]

Answer:

c. 108.4

Step-by-step explanation:

cos theta = (u dot v)/ (||u||  ||v||)

where dot stands for dot product and || || is the magnitude

u = (1,5)   v= (7,-4)

u dot v = (1*7 + 5*-4)  = 7-20 = -13

||u|| = sqrt( 1^2 +5^2) = sqrt(1+25) = sqrt(26)

||v|| = sqrt(7^2 + (-4)^2) = sqrt(49+16) = sqrt(65)


cos theta = -13/ sqrt(26) sqrt(65)

cos theta = -13 /sqrt(1690)

theta = arccos (-13/sqrt(1690))

theta = 108.43

6 0
3 years ago
Read 2 more answers
Pls help me on number 2 I will mark brainliest
viktelen [127]

Answer:

A

Step-by-step explanation:

7 0
2 years ago
What is the volume of the prism? enter your awnser in the box as a mixed number in simplist form​
liberstina [14]

Answer:

67 1/2 is a mixed number

Step-by-step explanation:

The volume of a prism, is the area of the cross section X the length:

In this case it is base × height × length:

6 × 4.5 × 2.5 = 67.5cm^3

= 67 1 / 2 as a mixed number

4 0
2 years ago
How do u do percentage​
lbvjy [14]

Answer:

Step-by-step explanation:

Ill try to break this down, simply:

When we talk about percentages we are talking about how much part of something we have and the percent sign is a just a symbol representing that.

Lets say we have 2 out of 10 apples and we need to convert this to a percentage

First think about how many apples we have in total... and that would be 10, and then how many apples we currently have being 2:

So if we put the part that we have over the whole thing we get:

\frac{2}{10}

So now lets turn this into a decimal, when its something over 10 its really easy, all we have to do is move the decimal back one place!

So we have 2 and if we move the decimal back one place we get .2 or 0.2

Now we have our decimal, to convert this into a percentage all we have to do is multiply our decimal by 100

So:

0.2 x 100 = 20%

All you do when you multiply by 100 is move the decimal back over 2 places one place for each zero so:

0.2 --> 2. --> 20.

Which gives us again 20%

3 0
2 years ago
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