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3 years ago

Please Help this is Due in 1 hour and I really dont understand any of this. (Question in Image)

Mathematics

1 answer:

vaieri [72.5K]3 years ago

5 0

Answer:

(-4, -1/2)

Step-by-step explanation:

to calculate the midpoints bt of the line use the ormula:

$( \frac{x1 + x2}{2} \frac{y1 + y2}{2} )$

Where (x1, x2) is one coordinate point and (y1, y2) is anither coordinate point. Any two points will work, but I chose A (-5,-4) and B (-3, 3).

$( \frac{ - 5 + ( - 3)}{2} \frac{ - 4 + 3}{2} )$

(-4, -1/2)

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4/9 divided by ? equals 12

emmasim [6.3K]

4/9 ÷ x = 12
u always do the opposite, in an equation/inequality.
multiply 4/9 on both sides.
4/9 * 12/1 = 48/9
so it's 48/9

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4 years ago

If you multiply pi by a fraction do you get a rational number?

irinina [24]

Answer: yes

Step-by-step explanation:

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3 years ago

Bivariate Data problem. Image attached. A. 5.967 B. 6.671 C. 9.352 D. 9.338

Fed [463]

Answer:

Step-by-step explanation:

$s_x$ is the standard deviation of x.

The standard deviation is gotten by:

1. find the average of x-values (add up all the values and divide by number of numbers, which is 5)

2. subtract the average, x bar, from each of the values, square it, and add up the difference

3. Divide that final answer by n, which is 5

4. Take the square root of the answer

Now, let's find the average (x bar):

x bar = $\frac{2+6+9+14+19}{5}=10$

Doing steps 2 & 3 together:

$\frac{(2-10)^2+(6-10)^2+(9-10)^2+(14-10)^2+(19-10)^2}{5}\\=35.6$

Doing step 4:

$\sqrt{35.6} =5.967$

Correct answer is A

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4 years ago

During off hours, cars arrive at a tollbooth on the East-West toll road at an average rate of 0.5 cars per minute. The arrivals

Norma-Jean [14]

Answer:

$P(X=3) = 2.5^3 \frac{e^{-2.5}}{3!}=0.214$

Step-by-step explanation:

Definitions and concepts

The Poisson process is useful when we want to analyze the probability of ocurrence of an event in a time specified. The probability distribution for a random variable X following the Poisson distribution is given by:

$P(X=x) =\lambda^x \frac{e^{-\lambda}}{x!}$

And the parameter $\lambda$ represent the average ocurrence rate per unit of time

For this case we know that $\lambda =0.5 cars/min$

And we want the probability that during the next five minutes, three cars will arrive, so then our rate becomes:

$\lambda = 0.5 \frac{cars}{min}* 5 min = 2.5 cars$

And we want this probability:

$P(X=3)$

And if we use the pmf we got:

$P(X=3) = 2.5^3 \frac{e^{-2.5}}{3!}=0.214$

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4 years ago

Please help with this inequality

valentinak56 [21]

Answer:

The answer is A.

Step-by-step explanation:

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3 years ago

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