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Burka [1]
3 years ago
13

Sample size n=150 are randomly selected from the U.S. census data, and the income range is found for each sample. What is the di

stribution of the sample ranges?
A: normal (approximately)
B: not enough information provided
C: skewed to the right
D: skewed to the left
Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
5 0
Not enough information
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What is the average rate of change between f (1) and f (5) in the function f (x) = x2 - x - 6 ?
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Answer:

{ \tt{average =  \frac{f(1) + f(5)}{2} }} \\  \\  = { \tt{ \frac{( {1}^{2}  - 1 - 6) + ( {5}^{2} - 5 - 6) }{2} }} \\  =  \frac{ - 6 + 14}{2}  \\  \\  = { \tt{4}}

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£70 is divided between Natasha, Richard & Stephen so that Natasha gets twice as much as Richard, and Richard gets three time
Korvikt [17]

The share of Natasha is £ 42

<em><u>Solution:</u></em>

£70 is divided between Natasha, Richard & Stephen

Total amount = 70

Let the share of natasha be "x"

Let the share of richard be "y"

Let the share of stephen be "z"

Natasha gets twice as much as Richard

x = 2y ------ eqn 1

Richard gets three times as much as Stephen

y = 3z

z = \frac{y}{3} ----- eqn 2

Total amount = 70

share of natasha + share of richard + share of stephen = 70

x + y + z = 70

Substitute eqn 1 and eqn 2

2y + y + \frac{y}{3} = 70\\\\\frac{6y+3y+y}{3} = 70\\\\10y = 210\\\\y = 21

Substitute y = 21 in eqn 1

x = 2y = 2(21) = 42

x = 42

Thus natasha gets £ 42

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3 years ago
Mrs. Alvarez asked her class how many hours of TV they watched per day (to the nearest half hour) The results were shown: 0 - 1
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Answer: 7/12

Step-by-step explanation:

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3 years ago
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Can y’all help me on question 7 please?
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It would be a I’m pretty sure
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Mr, Obrien needs to buy 8 television for the school. Each television costs $795. Mr. O'Brien has 120 fifty-dollar bills that he
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A. $6360, B. He doesn't have enough money.

Step-by-step explanation:

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