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3 years ago

Your a GENIUS if you can answer this question.

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

5 0

Let the function equal 416 and solve for x.

2x^2 - 6x = 416

2x^2 - 6x - 416 = 0

x^2 - 3x - 208 = 0

(x - 16)(x + 13) = 0

x - 16 = 0 or x + 13 = 0

x = 16 or x = -13

Since the number of rows cannot be negative, discard the -13 solution.

Answer: There are 16 rows.

nevsk [136]3 years ago

4 0

The answer is D.
f(x) = 2x^2-6x
416=2x^2-6x
208=x^2-3x
0=x^2-3x-208
0=(x-16)(x+13)
x=16 x can not be equal to -13.
Hopes this loves.

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Huck and Jim are waiting for a raft. The number of rafts floating by over intervals of time is a Poisson process with a rate of

Harrizon [31]

Answer: 0.0081

Step-by-step explanation:

Let X be the number of rafts.

Given : The mean number of rafts floating : $\lambda=0.4$ rafts per day .

Then , for 7 days the number of rafts = $\lambda_1=\lambda\times 7=0.4\times7=2.8$ rafts per day .

The formula to calculate the Poisson distribution is given by :_

$P(X=x)=\dfrac{e^{-\lambda_1}\lambda_1^x}{x!}$

Now, the probability that they will have to wait more than a week is given by :-

$P(X>7)=1-P(X\leq7)\\\\=1-(P(0)+P(1)+P(2)+P(3)+P(4)+P(5)+P(5)+P(6)+P(7))\\\\=1-(\dfrac{e^{-2.8}2.8^{0}}{0!}+\dfrac{e^{-2.8}2.8^{1}}{1!}+\dfrac{e^{-2.8}2.8^{2}}{2!}+\dfrac{e^{-2.8}2.8^{3}}{3!}+\dfrac{e^{-2.8}2.8^{4}}{4!}+\dfrac{e^{-2.8}2.8^{5}}{5!}+\dfrac{e^{-2.8}2.8^{6}}{6!}+\dfrac{e^{-2.8}2.8^{7}}{7!})\\\\=1-0.991869258012=0.008130741988\approx0.0081$

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4 0

3 years ago

I just need to know what is m=

natali 33 [55]

Answer:

- 2

Step-by-step explanation:

Given :

Point A = (-1, 4)

Point B = (1, 0)

x2 = - 1 ; y2 = 4 ; x1 = 1 ; y1 = 0

Rise = (y2 - y1) = 4 - 0 = 4

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3 years ago

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iVinArrow [24]

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3 years ago

Thirty-six of the students in the school choir like to sing solos. These 36 students make up 24% of the choir. How many students

lubasha [3.4K]

Answer:

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We can write a proportion to find the total amount in the choir using the information given. A proportion is two equivalent ratios set equal to each other.

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3 years ago

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iVinArrow [24]

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3 years ago