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Vilka [71]
3 years ago
10

The sequence a1, a2, a3, . . . , an of n integers is such that ak = k if k is odd and ak = –ak – 1 if k is even. Is the sum of t

he terms in the sequence positive?
Mathematics
1 answer:
nasty-shy [4]3 years ago
5 0

Answer:

Step-by-step explanation:

The

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Find how many numbers greater than 400,000 can be made using all the digits of 416566​
Mandarinka [93]

Answer:

20

Step-by-step explanation:

You have to fill in 6 slots _ _ _ _ _ _.

Since first digit must be 4, there is only 1 way to fill in the 1st slot.

with the 5 slots, we fill in the 6s first, 3 of them.

So we have 5 options and 3 items to fill, (5 choose 3).

Then 2 ways to fill 1 and 1 way to fill 5. (It doesn't matter if you pick 5 or 1 first).

So it becomes (5C3) * (2C1) *(1C1)

= 1 * 5!/(3!)(5-3)! * (2) * 1

= 20

4 0
3 years ago
Mauricio conducted an experiment in which he drew marbles out of the bag and recorded the colors. The results of the experiment
Rzqust [24]
60 to 14 would be the answer I think.

3 0
3 years ago
Read 2 more answers
6 = -4x + y<br> -5x - y = 21<br> Please Help Fast!!!!!! Substitution
Vera_Pavlovna [14]

Answer:

y = 4x + 6

-5x - 4x - 6 = 21

-9x - 6 = 21

-9x = 27

x = -3

y - 4(-3) = 6

y + 12 = 6

y = -6

(-3, -6)

5 0
3 years ago
Plese help me its timed
Nadusha1986 [10]

Answer:

(3,2) I think

Step-by-step explanation:

X= 3

Y=2

3 +2 =5

3-2=1

3 0
2 years ago
Can someone please help me.
skelet666 [1.2K]
To find the slope of the line, you need two points.
(-2 , 5) and (3 , -5)

5 - (-5) / -2 - 3
10 / -5  = -2

The slope of the line is -2. So your answer is C.
8 0
2 years ago
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