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3 years ago

What happens to the mean of the data set shown below if the number 20 is added to the data set?

Mathematics

1 answer:

nasty-shy [4]3 years ago

6 0

Answer: The data set is missing therefore I will give you a more general answer

answer : The mean value will shift ( to the right ) by 20

Step-by-step explanation:

when a number is added to each data value in a data set the mean value will shift ( to the right ) likewise the mode, and Median by the same amount that was added to the data set . but the range and IQR will remain unchanged

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Heller Co. incurred the following costs in 2005:

professor190 [17]

Answer:

Step-by-step explanation:

Wee have research and development costs:

$150,000 + $185,000 = $335,000 + $125,000 =TOTAL $460,000

Testing for evaluation of new products can be considered since these new products are results from the research and development done by Heller Co.

3 0

3 years ago

Add.<br><br> −1 2/5+(−3/5)+(−3/4)

inna [77]

Answer:

-2 3/4

Step-by-step explanation:

4 0

3 years ago

Please help!<br>what polynomial must be added to <br>−5x^3 + 4x − 3 so that the sum is x^2 − x − 1?

lakkis [162]

<h3><u>Solution:- </u></h3>

Let the number to be added be A

Now,

$\begin{gathered}\implies\quad \sf −5x^3 + 4x − 3 + A = x^2 − x − 1 \\\end{gathered}$

Transposing (−5x³+ 4x − 3 ) to other side-

$\begin{gathered}\\\implies\quad \sf A = x^2 − x − 1 -( −5x^3 + 4x − 3) \\\end{gathered}$

Remember if there is a -ve sign before a bracket the signs of whole of the terms changes on opening bracket

$\begin{gathered}\\\implies\quad \sf A = x^2 − x − 1 + 5x^3 - 4x + 3\\\end{gathered}$

Putting like terms together -

$\begin{gathered}\\\implies\quad \sf A = 5x^3 +x^2 - x -4x +3 -1 \\\end{gathered}$

$\begin{gathered}\\\implies\quad \sf A = 5x^3 +x^2 -5x +2 \\\end{gathered}$

$\longrightarrow$ Therefore, 5x³+x²-5x +2 should be added to −5x³+ 4x − 3 to get x²− x − 1

6 0

3 years ago

Identify the slope and the y-intercept of each line.

dmitriy555 [2]

I need a picture or an example to help you. To identify the slope and y-intercept you have to do slope intercept form. Y=mx+ b or y=slope+ y intercept. If you are looking at a graph then, the y intercept is the only point on the y axis. To find the slope on a graph you have to count how much the point rises and moves from each point. Like, if my point was (1,3) and the next point was (3,4). To get to (3,4) you would have to go up 1 and move 3 spaces to the right. Your slope would be 1/3.

6 0

3 years ago

I need help with this

marysya [2.9K]

Plug in -8 for x to get 8(-8)+8y=-48. then you have -64+8y=-48. add 64 to the right side of the equation to get 16. now you have 8y=16. divide by 8 to have the variable by itself so y=2.

3 0

4 years ago