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3 years ago

I need help with 13 please ASAP

Mathematics

1 answer:

mote1985 [20]3 years ago

7 0

338.50 - 45 = 293.50 was spent on tolls

293.50 / 14 = 20.96

so 21 tolls

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Estimate first, and then solve using the standard algorithm. Show how you rename the divisor as a whole number. 6.39 ÷ 0.09

Talja [164]

Answer:

Step-by-step explanation:

8 0

3 years ago

Four streets enter a traffic circle at points A B C and D name six arcs formed by the streets.

lilavasa [31]

Arcs are just sections of the circle
so lets say you had a pizza

and you put some points on the crust, the legnth of the crust from point to point is that arc

example
if you put poins A and B, then arc AB is the crust between points A and B

arcs can include other points as well
and arc AB=arc BA

so
I wil name easy arcs first
arc AB
arc BC
arc CD
ard DA

now ones that include others
arc AC
arc BD

so the arcs you might want to list are

arc AB
arc BC
arc CD
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5 0

3 years ago

Find where the two lines intersect.Please help

ElenaW [278]

7. (4,5) 8. (5,-3) hope that helps

8 0

3 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

6+9=============================================================================================================================

Scilla [17]

Answer:

Step-by-step explanation:

6+9=15

7 0

3 years ago

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