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ArbitrLikvidat [17]
3 years ago
5

What is seven over twenty one take away one over twenty one in its simplest form

Mathematics
1 answer:
natulia [17]3 years ago
5 0
It would be 6/21 but simplified it would be 2/7
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In one school, a half of all students who like math like science as well. Also, in that school, a third of all students who like
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Answer: 2/3

Step-by-step explanation:

N is the total number of students

M is the number of students thta like math

S is the number of students that like science.

We know that half of the elements in M also are elements from S

And a third of the elements of S also are elements of M

And because those elements are common elements for both sets, we should have that:

M/2 = S/3

then we have that:

M = (2/3)*S

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this means that the number of students that like math is 2/3 times the number of students that like science.

6 0
4 years ago
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The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel is a normally distribu
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Answer:

a) Standard error = 0.5

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Step-by-step explanation:

We are given the following in the question:

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Sample size , n = 36

Standard Error =

=\displaystyle\frac{\sigma}{\sqrt{n}} = \frac{3}{\sqrt{36}} = 0.5

99% Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.01} = \pm 2.575

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4 0
3 years ago
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AysviL [449]

Answer:

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Step-by-step explanation:

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c) (1+2)²-5

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3 years ago
Stan worked 4 years less than Marco. This year Stan has worked 29 years. If b is how long Marco worked, the equation b – 4 = 29
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By adding 4 to both side
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nikdorinn [45]

Answer:

D is the answer

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