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3 years ago

Recursive formula for a geometric sequence with a starting value of 8 and a common ratio of 5

1 answer:

5 0

$a_2=5a_1$
$a_3=5a_2$
$a_4=5a_3$
...
$a_n=5a_{n-1}$

So the recursive formula is

$\begin{cases}a_1=8\\a_n=5a_{n-1}&\text{for }n>1\end{cases}$

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The coastline of the United States is 12,383 miles long Canada coastline is 113,211 miles longer than the coastline of the Unite

jek_recluse [69]

125,594 miles. Canada coastline (x) - U.S. Coastline (12,383) = 113,211.
x - 12,383 = 113,211
x - 12,383 + 12,383 = 113,211 + 12,383 (by addition property of equality)
x = 113,211 + 12,383
x = 125,594
Basically, you add the two given numbers together.

8 0

3 years ago

Read 2 more answers

Simplify 4 + (−3) − 2 × (−6)

Olegator [25]

So order of operations

4-3+12

now we solve left to right

1+12=13

13

:)

4 0

3 years ago

Read 2 more answers

A survey of 250 adults found that during the last year, 70 traveled by plane but not by train, 70 traveled by train but not by p

11111nata11111 [884]

<h2>Answer:</h2>

<em><u>People who didn't travel by any mode = 45</u></em>

<h2>Step-by-step explanation:</h2>

In the question,

Total number of people included in survey = 250

People who traveled by plane but not by train = 70

i.e.

a + e = 70

People who traveled by train but not by plane = 70

i.e.

c + d = 70

People who traveled by Bus but not by Plane or Train = 20

i.e.

f = 20 ..........(1)

People who traveled by bus and plane both = 45

i.e.

e + g = 45

People who traveled by all three = 20

i.e.

g = 20

People who traveled by Plane or Train = 185

i.e.

a + b + c + d + e + g = 185 ........(2)

So,

e = 45 - g = 45 - 20 = 25

e = 25

Now, on putting in eqn. (2) we get,

a + b + c + d + 25 + 20 = 185

a + b + c + d = 140 .......(3)

Now,

We need to find out,

Number of people travelling with any of these three is,

a + b + c + d + e + f + g

So,

On putting from eqn. (3) and (1), we get,

a + b + c + d + e + f + g = 140 + 25 + 20 + 20 = 205

So,

Number of people who didn't travel by any mode =Total people - Number of people travelling by any three

<em><u>People who didn't travel by any mode = 250 - 205 = 45</u></em>

5 0

3 years ago

13. In a park there are 1596 trees in 42 rows. If each row has the same number of trees, estimate the number of trees in one row

Harlamova29_29 [7]

Answer:

The ultimate answer according to the question is is 40 trees in one row.

Step-by-step explanation:

Let no. of trees in one row be X.

There are 42 rows,

or, 42X= 1596

or, X= 1596/42

So, X=38

Now, while rounding off to the nearest ten 38 goes to 40.

5 0

3 years ago

The cost of the book is morethan or equal to 300

sertanlavr [38]

The question isn’t clear.

5 0

3 years ago