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Eva8 [605]
3 years ago
12

Let A = {1, 2, 3, 4, 5, 6, 7, 8, 9}. n distinct integers will be chosen from A. How big does n have to be

Mathematics
1 answer:
Hitman42 [59]3 years ago
7 0
Partition the set A into 4 subsets: {1, 8}, {2, 7}, {3, 6}, and {4, 5}, each consisting of two integers whose sum is 9. If 5 integers are selected from A, then by the Pigeonhole Principle at least two must be from the same subset. But then the sum of these two integers is 9.
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What is 24.9% in decimal form ?
Sati [7]

Answer: 0.249

Step-by-step explanation: To write a percent as a decimal, first remember that a percent is a ratio that compares a number to 100.

We can think of 24.9% as the ratio 24.9 to 100 or 24.9 ÷ 100.

Remember that dividing by 100 moves the decimal point two places to the left so 24.9 ÷ 100 will move the decimal point two places to the left which would give us .249 or 0.249.

Therefore, 24.9% can be written as the decimal 0.249.

7 0
3 years ago
Help me Divide please 15 points & mark brainliest
arlik [135]
The answer to the first one is 9/4
The answer to the second one is 20/9
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7 0
3 years ago
Is the ordered pair
FrozenT [24]

Answer:

no, because for x=-3, y would have to be -31

Step-by-step explanation:

boy oh boy (or girl oh girl) - you wrote this in a horrible, horrible format.

I can only guess what your problem and the fitting answer would be.

y = -2×x^2 + 3×x - 4

-4 = -2×(-3)^2 + 3×(-3) - 4

-4 = -2×9 - 9 - 4

-4 = -18 - 9 - 4

-4 = -31

and that is wrong. for (-3,-4) to be on the graph of the function, y would have to be -4 when using x=-3 in the function. but y = -31 for x= -3.

8 0
3 years ago
Who can help me ????.<br>instruction find the missing length.​
djverab [1.8K]

Answer:

19 is the answer i think.

7 0
3 years ago
A bag contains 6 red marbles, 6 white marbles, and 4 blue marbles. Find P (red or blue)
AnnyKZ [126]
The answer is B.

If there are 6 red marbles, 6 white marbles, and 4 blue marbles, then there are 16 marbles total. To find the probability (P) of either the red or blue marbles, you will add together the number of red and blue marbles, and divide that by the total:

(6 + 4) / (6 + 6 + 4)
10/14

This fraction can further reduce to 5/8 (by dividing both the numbers by 2). 
6 0
3 years ago
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