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3 years ago

Find the thirteenth term of an arithmetic sequence if the first term is 3 and the common difference is 3

Mathematics

1 answer:

lesya692 [45]3 years ago

8 0

Answer:

Step-by-step explanation:

Formula for the nth term (an) = a1 + d(n - 1) where a1 = the first term and d = common difference.

So here the 13th term = 3 + 3(13 - 1)

= 3 + 3*12

= 39 (answer).

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I don't know how to do this, can someone explain me

Kaylis [27]

Answer:

-8+√5a-5 =-3

√5a-5 =5

a=6

5(6)=30

30-5=25

√25=5

-8+5=-3

5 0

4 years ago

QUESTIONS 1,2,3 PLSSSS (PICTURE ATTACHED) :)

Brums [2.3K]

Answer:

A) 20/6

B)21/16

C)21/10 or 2.1

Step-by-step explanation:

<h2>EDIT!: someone else who probably has a better understanding than me answered this and I've been doing this all wrong lol please ignore this .w.</h2>

to find any probability just find the total and then divide that by the number of whatever you're checking for, eg. parkour backgrounds.

7+3+4+6 = 20 total backgrounds

6 parkour backgrounds.

20/6 is your answer.

6 + 10 + 5 = 21 total marbles

10 + 6 = 16 non yellow marbles

21/16 is your answer.

6 + 10 + 5 = 21 total marbles

10 blue marbles

21/10 or 2.1 is your answer.

5 0

3 years ago

Read 2 more answers

In Triangle ABC, the length of Segment AB is equal to the length of segment AC. The length of segment BC is 4 less than twice th

seraphim [82]

Step-by-step explanation:

Let x be the length of segment AB.

Then the length of segment BC is (2x - 4).

The length of segment AC is x.

We know that x + (2x - 4) + x = 52.

Therefore 4x - 4 = 52, 4x = 56, x = 14.

Hence the length of segment AB is 14.

7 0

3 years ago

Can somebody please explain question (i) and (ii) to me

yuradex [85]

<h2>♨ANSWER♥</h2>

hey buddy, if u attach your question to this we can help you to find an answer for your question.

☆...hope this helps...☆

_♡_mashi_♡_

4 0

2 years ago

These are the first six terms of a sequence with a = 2:

inn [45]

Answer:

$a_{n}$ = 9 $a_{n-1}$

Step-by-step explanation:

Note there is a common ratio r between consecutive terms of the sequence, that is

r = 18 ÷ 2 = 162 ÷ 18 = 1458 ÷ 162 = 13122 ÷ 1458 = 9

A recursive formula allows a term in the sequence to be found by multiplying the previous term by the common ratio, that is

$a_{n}$ = 9 $a_{n-1}$ with a₁ = 2

7 0

3 years ago