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lilavasa [31]
3 years ago
7

Three U.F.O.'s were constructed in consecutive years. Their ages have a sum of

Mathematics
1 answer:
Dahasolnce [82]3 years ago
7 0

Answer: 41, 42, and 43 years old.

Step-by-step explanation:

41 plus 42 plus 43 = 126.

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marissa [1.9K]
I think it would be the second question!
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2 years ago
An electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricit
TiliK225 [7]

Answer:

atleast 385

Step-by-step explanation:

Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.

Population std deviation = \sigma = 50

Sample size =n

STd error of sample mean = \frac{50}{\sqrt{n} }

Margin of error for 95% would be Critical value ( std error)

Here since population std dev is known we can use Z critical value= 1.96

1.96*\frac{50}{\sqrt{n} }19.6^2\\n>384.16

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3 years ago
If 2(x + 3) + 7x = 3(x - 2) - 9, then x = ?
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Answer:

x=− 7 over 2 =−3.500

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5 0
3 years ago
Read 2 more answers
A husband and wife celebrate their birthdays on the same day of the month, but in different months. every year, their birthdays
pychu [463]
Husband is in march
wife is after march
we have
b-days are same day
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also, they fall on the same day of the week
so continuing ex. march 3 wed and june 3 wed

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basically, the easy way to find it is to look at the months and see which months that are after march start on the same day
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3 0
3 years ago
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Two houses on the same side of the street have house numbers that are consecutive
DochEvi [55]

Answer:

28 and 30

Step-by-step explanation:

'x' = 1st consecutive #

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x + x+2 = 58

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x = 28

x+2 = 30

3 0
2 years ago
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