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Alex Ar [27]
3 years ago
13

I'm a little confused on how to solve this. Show steps as well as the answer. thank you :)

Mathematics
1 answer:
Maru [420]3 years ago
6 0
6 it is the same as the other I think
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Step-by-step explanation:

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3 years ago
The average of 4, 9, 16, 25 and x is 2x. What is the value of x? A) 4 B)6 A)9 C)9 D)12
Elodia [21]
The average of 4, 9, 16, 25 and x is 2x means that;
(4+9+16+25+x)/5=2x
Multiply both side by 5
5(54+x)/5=2x(5)
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Subtract x to both side
54+x-x=10x-x
54=9x
Divided 9 to both side
54/9=9x/9
x=6
Check:
Substitute x with 6
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(4+9+16+25+6)/5=2(6)
60/5=12
12=12; so x=6 which marks B as the correct answer. Have a nice day!
5 0
3 years ago
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Answer:

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