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Lady bird [3.3K]
4 years ago
11

Which formula can be used to describe the sequence below? –8, –5, –2, 1, 4, ...

Mathematics
2 answers:
timofeeve [1]4 years ago
6 0

D. an = an-1+3; a1 = -8

EG. 2020

makvit [3.9K]4 years ago
3 0

Answer:

an = -8 +3(n-1)

an = -11 +3n

f(n) = -11 +3n

Step-by-step explanation:

–8, –5, –2, 1, 4, ...

This is an arithmetic sequence.

We are increasing by 3 each time

-8 +3 = -5

-5+3 = -2

-2 +3 = 1

The common difference is 3

The formula for an arithmetic sequence is

an = a1 +d (n-1)

an = -8 +3(n-1)

an = -8 +3n -3

an = -11 +3n

The nth term is -11 +3n

f(n) = -11 +3n

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Galina-37 [17]

Answer:

2 hours, 15 minutes

B.

Step-by-step explanation:

3:30 to 5:30 is 2 hours elapsed time.

5:30 to 5:45 is 15 minutes elapsed time.

2 hrs + 15 mins =2 hrs 15 mins.

6 0
3 years ago
Read 2 more answers
Ariel left her home at 9 a.m., driving at 45 mph. At 11 a.m. her brother left the home and started after her at 60 mph. At what
Vlada [557]

Answer:

5:00 pm

Step-by-step explanation:

Let

x -----> the umber of hours

y ----> the total distance in miles

we know that

The distance is equal to the speed multiplied by the time

Find out the distance traveled by Ariel at 11:00 am

11:00 am-09:00 am=2 hours

45(2)=90 miles

so

<em>Ariel's linear equation is</em>

y=45x+90 ----> equation A

<em>Ariel's brother linear equation is</em>

y=60x ----> equation B

Equate equation A and equation B

60x=45x+90

Solve for x

60x-45x=90

15x=90

x=6\ hours

Adds 11:00 am + 6 hours=17:00 =5:00 pm

6 0
4 years ago
Ahmad rented a truck for one day. There was a base fee of $17.99, and there was an additional charge of 88 cents for each mile d
Masteriza [31]

Answer:

266 miles

Step-by-step explanation:

(244.09-17.99)/0.85=266

6 0
3 years ago
72 is what percent of 240 ?
PilotLPTM [1.2K]

Answer:

72 = 30%

Step-by-step explanation:

240 = 100%

24 = 10%

12 = 5%

2.4 = 1%

72 / 24 = 3

72 = 30%

Let me know if I got it wrong :)

4 0
3 years ago
Read 2 more answers
2.85 as a mixed number
WARRIOR [948]
The number 2.85 can be writen using the fraction 285/100 which is equal to 57/20 when reduced to lowest terms.
It is also equal to 2 17/20 when writen as a mixed number.
You can use the following approximate value(s) for this number:57/20 =~ 2 6/7 (if you admit a error of 0.250627%)2.85 =~ 2 5/6 (if you admit a error of -0.584795%)2.85 =~ 3 (if you admit a error of 5.263158%)
3 0
3 years ago
Read 2 more answers
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