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3 years ago

9

Negative 17 minus negative 9

1 answer:

zimovet [89]3 years ago

4 0

My teacher always told me keep change and then opposite
so keep -17
change the minus sign to plus sign
and the opposite is postive 9
*-17+9=-8*
Remember different sign you subtract and keep sign of the biggest number

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An artist wants to frame a square painting with an area of 400 square inches. She wants to know the length of the wood trim that

Maurinko [17]

Area=legnth times width

if legnth=x
and
area=400

400=x times width

wait
SQUARE painting
legnth=width
width=x

400=x times x
400=x^2
sqrt both sides
20=x
answer is 20 in

equation is
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3 years ago

mack plans to meet his 4 friends. how many different ways can he make his visit if he visits each friend once?

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4 years ago

How would adding a score of zero affect the mean and mediam game scores

Nimfa-mama [501]

Answer:

Here is the complete question attached with.

The mean score would decrease more than the median score.

Step-by-step explanation:

The numbers for which we have to find the mean and median are:

$60,70,80,80,100$

Here the mean, $\frac{Sum\ of\ all\ observations}{Number\ of all\ observations} =\frac{60+70+80+80+100}{5} =78$

Median, $=80$ as median is the middle term if the observations are arranged in ascending order.

Now as the question says that we have to add a zero to see its effect.

So adding a zero we have

Mean $=\frac{0+60+70+80+80+100}{6} =65$

Median $= \frac{70+80}{2} =75$ ,as number of observations is even terms so we will add two middle numbers and divide it with $2$ .

So we can conclude that the mean is having more variation than the median.

Mean shows as variation of $78-65=13$ where as Median shows a variation of $80-75=5$ only.

So our final answer is option D that is "The mean score would decrease more than the median score."

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3 years ago