MATHEMATICS MIDDLE SCHOOL

Notebooks cost $1.20 each. This weekend they will be on sale for $0.80. What percentage is the sale?

Answers

Answer 1

Answer: The percentage will be 33%.
1.2 - .8=.4
1.2/.4=.33

Answer 2

Answer:

Answer:

67%

Step-by-step explanation:

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In a survey, 70 out of 84 people from the north prefer professional football over college football. 120 people from the south were asked the same question. In order for favorite type of football and region to be independent, how many people in the south would have to prefer professional football

Answers

Answer: Around 100 people will answer that they prefer professional football.

Step-by-step explanation:

In the north, 70 out of 84 prefer professional football, then the relative frequency is

p = 70/84 = 0.83

Now, in the south, they asked to 120 people, and we can assume that the relative frequency will be about the same than in the north (because the relation is independent, which means that the region does not affect on the answer to the question of if they prefer professional or college football), so we have that if X people prefer professional football, we have:

p = X/120 = 0.83

X = 120*0.83 = 100

So around 100 people will answer that they prefer professional football.

Which expression is equivalent to this one?k · 6 + k · s

A. 6(k + s)

B. s(6 + k)

C. k(6 + s)

D. k · (6 + k) · s

Answers

A. 6(k + s)
It's the distributive property.

K*6+k*s= C. K(6+s)U have to multiply both the 6 and the s by k so u brother g the k to one side

Can 7 go into 42 and 91

Answers

7 times 6 is 42
91 divided by 7 is 13

Yes. Because 7 time 6 is 42, and 7 time 13 is 91

How can 12 people share an 8 segment gummy worm? find two ways

Answers

Okay, so this question has a lot to do with DISTINGUISHABILITY which basically means: Can you tell the difference between each of the 12 people and can you tell the difference between each of the 8 gummy worm segments?

There are 4 possibilities: The people and gummies are both distinguishable, the people and gummies are both indistinguishable, the people are distinguishable and the gummies are not, or the people are not distinguishable and the gummies are.

The people and gummies are both distinguishable. (This is the easiest case)
There are 8 gummies. Each gummy can go to 12 different people. So the total number of ways we can give 8 distinct gummies to 12 distinct people is 8^12.

The people and gummies are both indistinguishable (Much harder)
This case is not necessarily harder, but it is very tedious and requires lots of careful, boring work. You would have to list out every single possible case, 1 by 1, there are no easier shortcuts... for example
8 0 0 0 0 0 0 0 0 0 0 0
7 1 0 0 0 0 0 0 0 0 0 0
6 2 0 0 0 0 0 0 0 0 0 0
6 1 1 0 0 0 0 0 0 0 0 0
5 3 0 0 0 0 0 0 0 0 0 0
5 2 1 0 0 0 0 0 0 0 0 0
5 1 1 1 0 0 0 0 0 0 0 0
4 4 0 0 0 0 0 0 0 0 0 0
...
...
And this would keep on continuing until you're sure you have counted every single one. But remember:
4 4 0 0 0 0 0 0 0 0 0 0
is the same as
4 0 0 4 0 0 0 0 0 0 0 0
because the people are indistinguishable.
Lifehack: Use Wolfram Alpha for questions like this. I tried this just now and Wolfram Alpha stubbornly only counts partitions with all members greater than 1... so for this particular problem, WA won't work

The people are distinguishable but the gummies are not
This requires a bit more experience with combinatorics...
My comments above replying to the question talk about this. It is essentially 19C11 = 19C8.

The people are indistinguishable but the gummies are distinguishable
This is by far the hardest case. Remember our second case (The people and gummies are both indistinguishable (Much harder)).
Now we have to add on an extra step on top of all that partitioning. For each and every partition we have to calculate how many ways there are to make that partition. For the
8 0 0 0 0 0 0 0 0 0 0 there is only 1 possible way, all the gummies go to one person
For the
7 1 0 0 0 0 0 0 0 0 0 there is 8 possible ways, we choose one from the 8 gummies that goes to a new person (instead of the person that already has 7 gummies).

This brings everything to an end. I covered the general techniques for each of the 4 distinguishability cases. Hopefully this helps. If it does, please consider making this the brainliest answer. It took me quite a while to write this! :)

12 / 8 = 1.5 so each person gets 1.5 of the 8 segment gummy worm. OR
Try to spilt it in 12 evenly peices
Hope this helps

The two lizards in the United States are the gilamonster and the chuckwalla. The average Gila monster is 0.608 meter long. The average chuckwalla is 0.395 meter long. How many times as long is the Gila monster as the chuckwalla, to the nearest hundredth?

Answers

The Gila monster is approximately Ratio 1.54 times as long as the chuckwalla when their lengths are compared.

To find out how many times as long the Gila monster is than the chuckwalla, we divide the length of the Gila monster by the length of the chuckwalla. This gives us a ratio that expresses the relative size of the two species.

So, using the given average lengths:

Gila monster length: 0.608 meters

Chuckwalla length: 0.395 meters

We divide the length of the Gila monster by the length of the chuckwalla:

Ratio = Gila monster length / Chuckwalla length = 0.608 meters / 0.395 meters = 1.54 (rounded to the nearest hundredth)

So, the Gila monster is approximately 1.54 times as long as the chuckwalla.

For more such questions on Ratio, click on:

brainly.com/question/32531170

#SPJ2

This is easy, you just divide 0.608 by 0.395, which equals 1.54 (rounded to the nearest hundredth). So, the Gila monster is about 1.54 times as long as the chuckwalla.

Help me please!
What is the median of this data? 48, 60, 22, 84, 36

Answers

He is wrong. You first need to put it in order before getting the middle. Like so:
22, 36, 48, 60, 84
Now cross out 22, then 84, and so on till you're left with one number (the middle number)

THE ANSWER IS 48

22 because the median is just the middle number of a set of data

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