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xenn [34]
2 years ago
7

Help me with this question pleaseee

Mathematics
1 answer:
Bingel [31]2 years ago
5 0

Answer:

.

Step-by-step explanation:

.

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25. A sequence of positive integers with 2020 terms is called an FT sequence if each term
lana66690 [7]

Answer:

The first term in the sequence is odd-valued and so there are m choices for it.2020 Gauss Contest Solutions Page 19

The second term in the sequence is even-valued and so there are m − 1 choices for it.

Thus, there are a total of m × (m − 1) FT sequences that begin with an odd-valued term

followed by an even-valued term.

Finally, we consider the FT sequences that begin with an even-valued term followed by an

odd-valued term (Parity #4).

Again, there are exactly twice as many odd-valued terms as there are even-valued terms in the

first 2019 terms (since the pattern repeats even, odd, odd).

However in this case, the 2020th term is even and so there are fewer than twice as many odd valued terms as there are even-valued terms.

Thus, there are m2 + m × (m − 1) FT sequences that satisfy the required conditions.

Since there are 2415 such FT sequences, we may solve m2 + m × (m − 1) = 2415 by trial and

error.

Evaluating m2 + m × (m − 1) when m = 30, we get 302 + 30 × 29 = 1770, and so m is greater

than 30.

When m = 33, we get 332 + 33 × 32 = 2145.

When m = 34, we get 342 + 34 × 33 = 2278.

When m = 35, we get 352 + 35 × 34 = 2415, as required.

Answer: (D)

Step-by-step explanation:

8 0
3 years ago
Describe the shape of the data distribution.
Snowcat [4.5K]

Answer: Positively Skewed

Step-by-step explanation: I believe it looks to me like it's positively skewed. If you Google how negatively skewed and positively skewed distributions look like, I think it would help you. But hope this helped! :)

3 0
3 years ago
Read 2 more answers
(0.9) *(1.5 +5.8)
lisov135 [29]
(0.9)* (1.5+5.8)
First, Add the values to the right. You get (0.9) * (7.3)
Multiply 9 and 73 to get 730 -73, which is 700-43, 660 - 3, which is 657.
Divide by 100 by moving the decimal point to get 6.57 as your final answer.

Hope that helped!
7 0
3 years ago
Read 2 more answers
Micah is running a 6-mile race. There are water stops
pishuonlain [190]
I feel like it is 12
5 0
3 years ago
Greg is 5 times Sam's age. Greg is 15 years old. Write an equation to represent "s", Sam's age​
vfiekz [6]

Answer:

The equation to represent Sam's age​ is 15 ÷ 5 = s

s = 3

5 0
2 years ago
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