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2 years ago

Plz help me with this

Mathematics

1 answer:

Oxana [17]2 years ago

3 0

Answer:

sorry cant see the question

Step-by-step explanation:

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Is .72 repeating rational or irrational

Kamila [148]

Answer:

.72 is a rational number

Hope this helps!

4 0

2 years ago

Read 2 more answers

What is the least common multiple of 37 and 12

emmasim [6.3K]

To get the Least Common Multiple (LCM) of 37 and 12 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:

37: 3712: 223 LCM: 22337The Least Common Multiple (LCM) is: 2 x 2 x 3 x 37 = 444

4 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

A jeweler is making a triangular pendant. He has two sides of length 23 mm and 31 mm. What are the

denis-greek [22]

Answer:

38.60mm

Step-by-step explanation:

Step one:

Given data

We are given that the dimension of the triangles are length 23 mm and 31 mm

Let us assume that the triangle is a right angle triangle

Step two:

Applying the Pythagoras theorem we can find the third as

$z^2= x^2+y^2\\\\z^2= 31^2+23^2\\\\z^2= 961+529\\\\z^2= 1490\\\\$

square both sides

z= √ 1490

z= 38.60mm

Hence a possible dimension of the third side is 38.60mm

3 0

3 years ago

The lines graphed below are parallel. The slope of the red line is -4/3. What is the slope of the green line?

miss Akunina [59]

I believe the correct answer from the choices listed above is option C. The slope of the green line would be -4/3. Parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point. These lines should have equal slopes. Hope this answers the question.

4 0

3 years ago