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chubhunter [2.5K]
3 years ago
11

Which equations to the right are Not True? (A) 12-2=2-12 (B) 12+2=2+12 (C) 12x2=2=2x12 (D) 12/2=2/12 Prove your answer.

Mathematics
2 answers:
sasho [114]3 years ago
7 0
D is the the equation that isn’t correct
Genrish500 [490]3 years ago
6 0
I think the answer is A. Hope it helps
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A collection of half dollars and nickles is worth $13.40. there are 34 coins in all.
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3 0
3 years ago
What is the sum of the arithmetic sequence 3, 9, 15…, If there are 34 terms?
snow_tiger [21]

Answer:

first we find the common difference.....do this by subtracting the first term from the second term. (9 - 3 = 6)...so basically, ur adding 6 to every number to find the next number.

we will be using 2 formulas....first, we need to find the 34th term (because we need this term for the sum formula)

an = a1 + (n-1) * d

n = the term we want to find = 34

a1 = first term = 3

d = common difference = 6

now we sub

a34 = 3 + (34-1) * 6

a34 = 3 + (33 * 6)

a34 = 3 + 198

a34 = 201

now we use the sum formula

Sn = (n (a1 + an)) / 2

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s34 = 3468 <=== the sum of the first 34 terms:

6 0
3 years ago
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