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3 years ago

10

Jill incorrectly subtracted the two mixed numbers to find how much more blue fabric than purple fabric she should buy. Her work

is shown below.
4 1 third - 3 2 third = 12 thirds - 9 thirds

Why is Jill's work incorrect?

1 answer:

Pavlova-9 [17]3 years ago

6 0

41-32=9
12-9=3

9 is not equal to 3

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vampirchik [111]

we have

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Multiply by $-4$ both sides

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<u>the answer is</u>

$t=12\pi$

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There is a typing mistake in part (d) of the question. Original question states that total student are 17. In part (d) it asks out of 12 which I think is a mistake as total is 17. Therefore, I am finding the answers with total students as 17. In case if the total is 12 then by just replacing 17 with 12 we can find the answer.

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All the answers and explanations are given below.

Step-by-step explanation:

(a)

The random variable X will be defined as the number of students who will attend the Tet (Vietnamese New Year) festivities this year.

(b)

As X is the number of students so it can take any value from 0 to 17. This means that when X = 0, 0 student will attend the Tet (Vietnamese New Year) festivities this year. Similarly if X = 17, all 17 students will attend the Tet (Vietnamese New Year) festivities this year. It can only take whole number values because its the number of students.

(c)

X follows Binomial distribution with probability of success = 23% (success defined as attending the festivities).

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p = 23% = 0.23 (probability of success)

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(d)

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(e)

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(f)

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Answer:

Step-by-step explanation:

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Integrating both sides gives

$\displaystyle \int \frac{dx}{5-x} = C + \int \sum_{n=0}^\infty \frac{x^n}{5^{n+1}} \, dx$

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or

$\displaystyle \ln(5-x) = \boxed{\ln(5) - \sum_{n=1}^\infty \frac{x^n}{5^n n}}$

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