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AveGali [126]
2 years ago
7

What's the sum Sn of the first n terms of this given sequence?

Mathematics
1 answer:
valina [46]2 years ago
6 0

Answer: \frac{k(k+1)}{2}

Step-by-step explanation:

This is a standard formula.

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Choose all items where the equation matches the given table
sdas [7]

Answer:

1st, 3rd, 4th

Step-by-step explanation:

1st one: 43 x

multiply x by 43

7 x 43 = 301

7 x 43 = 258

10 x 43 = 430

3 x 43 = 129

4 x 43 = 172

(correct)

2nd one: 12x

multiply x by 12

2 x 12= 32

we know that 2 x 12 is 2 so this equation does not work

(incorrect)

3rd one: 202x

multiply x by 202

6 x 202 = 1212

4 x 202 = 808

10 x 202 = 2020

3 x 202 = 606

8 x 202 = 1616

(correct)

4th one: 13x

multiply x by 3

9 x 13 = 117

2 x 13 = 26

7 x 13 = 91

3 x 13 = 36

10 x 13 = 130

(correct)

3 0
3 years ago
Here are the two arguments you will be debating: Argument A: There is a need for students to understand and be able to construct
igomit [66]
The appropriate response is B. The contend that there is no requirement for understudies to utilize a compass and straightedge, and every single geometric development ought to be finished utilizing a drawing program is the wrong explanation since the power to control drawing programs is just open in a few spots. Not everyone would have the capacity to learn geometry in light of the fact that not everyone can have power. Everyone on the planet would not have a similar opportunity to learn geometry if just drawing programs had the information that we have today.
4 0
3 years ago
Please help ahh I don’t understand
meriva
I think the answer is b if not i’m really sorry
5 0
3 years ago
Read 2 more answers
PLEASE HELP
gayaneshka [121]
Area would be 66

You would simply multiple the width be the height to get your area!
5 0
3 years ago
Solve this quadratic equation using the quadratic formula. 3x2 + 5x + 1 = 0
iren [92.7K]
Solve for x over the real numbers:
3 x^2 + 5 x + 1 = 0
Hint: | Using the quadratic formula, solve for x.
x = (-5 ± sqrt(5^2 - 4×3))/(2×3) = (-5 ± sqrt(25 - 12))/6 = (-5 ± sqrt(13))/6:
Answer: x = (-5 + sqrt(13))/6 or x = (-5 - sqrt(13))/6
3 0
4 years ago
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