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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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A scientist cools some water at a constant rate. the graph and table show how the temperature of the water changes with time.
irina1246 [14]

Answer:

C

Step-by-step explanation:

The easiest way to determine this is to realize that time is the independent variable (n) and temperature is the dependent variable (a).

From the table, we can plug in the two points (n) into n of each equation and see if that equals the temperature values (a).

<em>A little thinking would get us to plug the numbers in C first.</em>

<em>a(n)=46-(n-1)*4\\46-(5-1)*4=30</em>

<em>Works!!</em>

<em>Now, second number:</em>

<em>a(n)=46-(n-1)*4\\46-(6-1)*4=26</em>

<em>Works!!</em>

<em />

<em>Hence, C is the correct answer.</em>

6 0
3 years ago
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What is 5x5 + 5 to the power of 5.
yulyashka [42]

So

  • (5×5+5)⁵
  • (25+5)⁵
  • (30)⁵

a^n=a×a×a×a..n times

  • 30(30)(30)(30)(30)
  • 24300000
7 0
2 years ago
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Let x= -1, y= -2 and z = 3 evaluate the following expression x/5y - 2z
RideAnS [48]
Just substitute the values: -1/-10-6 -> -1/-16 -> 1/16.
8 0
3 years ago
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Write 45/30 in simplest form​
RideAnS [48]

Answer:

1 1/2

Step-by-step explanation:

SO first convert into mixed

1 15/30

Now simplify

1 1/2

IF YOU DONT WANT MIX AND LEAVE AS IMPROPER

3/2

7 0
3 years ago
On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a
astra-53 [7]
The answer is .469  its just simply both percentages as percents multiplied together so .7*.67= .469
8 0
3 years ago
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