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sammy [17]
3 years ago
14

Find the sum of the first 20terms of this arithmetic progression: 2,5,8,11,.......​

Mathematics
1 answer:
postnew [5]3 years ago
8 0
Y = -1 + 3x... y1= 2, y2=5... so the 20th term will be 59. There will be ten pairs (i.e 2,59 equal 61... 5,56 equal 61) so multiply this 61 by 10 and your sum will be 610
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Pls help me with this no links please and Thank you
den301095 [7]
The top graph is correct because an x=# will create a vertical line at that #
4 0
3 years ago
Read 2 more answers
Question 2: show working out
kherson [118]
Answer in fraction form is exactly 2/27 
Answer in decimal form is approximately 0.07407

========================================================

Explanation:

4 people play both,9 play flat flute only, 12 play piano only.
So 4+9+12 = 13+12 = 25 people play one instrument only or they play both.

We have 27 people total meaning that 27-25 = 2 play neither instrument.

Divide the values 2 and 27 to get
2/27 = 0.07407
this value is approximate (rounded to five decimal places)

5 0
3 years ago
A population of bacteria begins with 1500 bacteria and grows to 4500 in one hour.
dezoksy [38]

The function that represents the growth of this culture of bacteria as a function of time is; P = 1500e^(1.0986t)

<h3>How to calculate Exponential Growth?</h3>

The formula for exponential growth is;

P = P₀e^(rt)

where;

P = current population at time t

P₀ = starting population

r = rate of exponential growth/decay

t = time after start

Thus, from our question we have;

4500 = 1500 * e^(r * 1)

4500/1500 = e^r

e^r = 3

In 3 = r

r = 1.0986

Thus, the function that represents the growth of this culture of bacteria as a function of time is;

P = 1500e^(1.0986t)

For the culture to double, then;

P/P₀ = 2. Thus;

e^(1.0986t) = 2

In 2 = 1.0986t

t = 0.6931/1.0986

t = 0.631 hours

Read more about Exponential Growth at; brainly.com/question/27161222

#SPJ1

4 0
1 year ago
9/25 of Polly's co-workers prefer tea over coffee.
snow_tiger [21]

Answer:

36%

Step-by-step explanation:

9/25 x 100

= 36%

3 0
3 years ago
Read 2 more answers
Shade the grid to represent the ratio 9/25. Then find a percent equivalent to the given ratio.
anzhelika [568]
Answers and workings in the attachment below.

3 0
3 years ago
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