3 years ago

Just need a correct answer

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

6 0

Answer: (11x-30)

Step-by-step explanation:

(4x+3)+(7x-33)=(11x-30)

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Use the arithmetic sequence of numbers 1, 3, 5, 7, 9,.to find the following:

Rasek [7]

$a)\\\\
a_{n+1}-a_n=d\\
for\ n=1\\
a_2-a_1=d\\
d=3-1=2\ - difference\ between\ two\ consecutive\ terms\\\\
b)\\
a_n=a_1+(n-1)d\\
n=101\\
a_{101}=1+(101-1)*2\\
a_{101}=1+100*2=200+1=201\\\\
c)\\
Sn=\frac{a_1+a_n}{2}*n\\
n=20\\
a_n=a_{20}=1+(20-1)*2=1+38=39\\
Sn=\frac{1+39}{2}*20=400\ \ Sum\ of\ the\ first\ 20 \ numbers.$

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3 years ago

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RSB [31]

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Step-by-step explanation:

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Zanzabum

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Ostrovityanka [42]

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3 years ago

7.6 x 103^3 in standard form

Sever21 [200]

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Step-by-step explanation:

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