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SashulF [63]
3 years ago
7

Help please and thanks​

Mathematics
2 answers:
Mandarinka [93]3 years ago
8 0
30 dolls.. hope you get a good grade
Tasya [4]3 years ago
6 0

Answer:

there are 30 dolls in total

Step-by-step explanation:

Since 20% = 6 dolls ur gonna multiply that by 5 which gets 100% = 30

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The sum of the first 15 terms of a geometric sequence with 7 as the first term and a common ratio of -3 is __________.
Andre45 [30]

Step-by-step explanation:

the formula for the sum of the first n terms of a geometric sequence is

Sn = s1(1 - r^n)/(1 - r)

with r being the common ratio and s1 is the first term.

so,

S15 = 7×(1 - (-3)¹⁵)/(1 - -3) = 7×(1 - -14,348,907)/4 =

= 7×14,348,908/4 = 7×3,587,227 = 25,110,589

4 0
2 years ago
I’m very confused so can someone help me with this math problem please.
GenaCL600 [577]

Answer:

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Step-by-step explanation:

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2 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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