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LiRa [457]
3 years ago
15

-8, 22, 52, 82, ... Find a 20

Mathematics
1 answer:
gladu [14]3 years ago
8 0

Answer:

Step-by-step explanation:

It is an arithmetic sequence with common difference d = 30.

a₂₀ = a₁ + (20-1)d = -8 + 19·30 = 562

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Find the sum of the first 47 terms of the following series, to the nearest integer.
topjm [15]

Answer:

The sum of the first 47 terms of the given series = 6016

Step-by-step explanation:

Given the sequence

13, 18, 23, ...

An arithmetic sequence has a constant difference 'd' and is defined by

a_n=a_1+\left(n-1\right)d

18-13=5,\:\quad \:23-18=5

As the difference between all the adjacent terms is the same.

so

d=5

a_1=13

Arithmetic sequence sum formula

n\left(a_1+\frac{d\left(n-1\right)}{2}\right)

Put the values

d=5

a_1=13

n=47

=47\left(13+\frac{5\left(47-1\right)}{2}\right)

=47\left(13+\frac{5\left(47-1\right)}{2}\right)

=47\left(13+115\right)

=47\cdot \:128

=6016

Thus, the sum of the first 47 terms of the given series = 6016

8 0
3 years ago
There are 8 paper clips, 4 erasers and 6 thumbtacks. The number of paper clips is ____the number of erasers. And the number of e
forsale [732]
<span><span>1.       </span>Given Data:
=> There are a total of 8 paper clips
=> There are also 4 erasers
=> And there are 6 thumbtacks.
Now, answer the following question
=> The number of paper clips is _____ the number of erasers
Let’s compare
There are 8 paper clips and 4 erasers.
Thus the number of paper clips is twice the number of erasers.
=> The number of erasers is ___ the number of thumbtacks>
There are 4 erasers and 6 thumbtucks.
Thus the number of erasers is 2/3 the number of thumbtucks </span>



8 0
3 years ago
What is the solution to the equation? <br> x – 19 = 1
Romashka-Z-Leto [24]
+ 19 on both sides, -19 becomes 0, 1 becomes 20 x=20
3 0
3 years ago
A a fraction close to but greater than 1 1/2
Bad White [126]

Answer:

Step-by-step explanation:

1 1/2 = 3/2

6 0
3 years ago
EXTRA POINTS PLS HELP WILL MARK BRAINLIEST :)
disa [49]

Answer:

1 is a parallelagram

Step-by-step explanation:

its a parallelogram because al the sides are equal and its leads to an positive angle measurement

4 0
3 years ago
Read 2 more answers
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