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solmaris [256]
3 years ago
13

The sum of 42 and twice a number is 164. find the number

Mathematics
2 answers:
Sergeu [11.5K]3 years ago
8 0
61 should be correct
Simora [160]3 years ago
6 0

Answer:

61

Step-by-step explanation:

let the number be x then twice the number is 2x, hence

42 + 2x = 164 ( subtract 42 from both sides of the equation )

2x = 122 ( divide both sides by 2 )

x = 61

Hence the number is 61


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Answer:y=4x+6

Step-by-step explanation:

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3 years ago
Steve's scores on 6 of his tests were 92, 78, 86, 92, 95, and 91. If he took a seventh test and raised the mean of his scores by
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Step-by-step explanation:

First we need to know the mean of the Steve's scores on 6 of his tests. Given the six scores as 92, 78, 86, 92, 95, and 91.

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If he took the seventh test and the mean score is raised by 1 them the new mean will be expressed as;

New mean = 92+78+86+92+95+ 91+x/7 = 89+1

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