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OLEGan [10]
2 years ago
7

Help!!! Will give brainiest!!

Mathematics
2 answers:
jeka57 [31]2 years ago
7 0

Answer:

1. c

2.a

3.d

4.b

Step-by-step explanation:

1.£7.50/3

2.£3.75/5

3.£6.00/4

4.£13:50/6

<u><em>Let me know if this helps xx</em></u>

<u><em></em></u>

LUCKY_DIMON [66]2 years ago
5 0

Answer:

a: $3.75

b: $13.50

c: $7.50

d: $6.00

Step-by-step explanation:

hope this helps!

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25 + 8 (7y - 3) + 3y
nasty-shy [4]

Answer:

59y+1

Step-by-step explanation:

25 + 8 (7y - 3) + 3y

Distribute

25+56y-24+3y

Combine like terms

59y+1

7 0
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Mr.jones is planning to plant grass and place a fence in a small area for his dog the rectangular dimensions are 12 x15 feet the
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Step-by-step explanation:

5 0
3 years ago
A painter bought 14 gallons of paint just enough to cover 2 room
OverLord2011 [107]
<h3>Answer:</h3>

7

<h3>Step-by-step explanation:</h3>

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6 0
2 years ago
A recent survey based on a random sample of n=470 voters, predicted that independent candidate for the mayoral election will get
julsineya [31]

I have an expression

\sigma = \sqrt{p(1-p)/n}

floating around in my head; let's see if it makes sense.

The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is

E( (b-p)^2 ) =  (-p)^2(1-p) + (1-p)^2p = p(1-p)

That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:

\sigma = \sqrt{p(1-p)/n}

Plugging in the numbers,

\sigma = \sqrt{.24(1-.24)/490} = 0.019 = 1.9\%

One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.

So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.

7 0
3 years ago
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