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harkovskaia [24]
2 years ago
5

PLEASE HELP. !!!!!!!!!!

Mathematics
2 answers:
Lesechka [4]2 years ago
4 0
This is the answer i supposed fot

Greeley [361]2 years ago
3 0
The answer is 80 degrees
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4.9x 10^2 as a decimal number????
harkovskaia [24]

Answer:

490.0...

Step-by-step explanation:

4.9 x 10^2

(squared)

4.9 x 10 x 10

the easiest way to do this is to move the decimal 2 places to the right, as

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4.9 x 100 = 490.0...

7 0
3 years ago
The sum of twice a number and three equals five. Find the number
Anna71 [15]
2n + 3 = 5 
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the sum of 2 times a number and three means you add 2n + 3 and since it is equal to 5 you then solve for n.
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3 years ago
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For an arithmetic sequence where a1 = 13 and the common difference is 3, find s7.
melamori03 [73]

Answer:

Answer:

D ) 154

Step-by-step explanation:

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S n = n/2 * ( a 1 + a n )

a 7 = a 1 + 6 d = 13 + 3 * 6 = 13 + 18 = 31

S 7 = 7/2 * ( 13 + 31 ) = 7/2 * 44 = 154

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3 years ago
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xxTIMURxx [149]

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Step-by-step explanation:

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20 points for each question
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