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3 years ago

PLEASE HELP 20 POINTS! WHO EVER'S GOOD AT PROBABILITY HELP!

1 answer:

6 0

Heads - 12
Tails - 13
Total Flips - 25
-- separate --
Probability of heads: $\frac{12}{25}=0.48$
Probability of tails: $\frac{13}{25} =0.52$
-- separate --
Heads: 48%
Tails: 52%

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Plz help it’s due tonight!!!

fenix001 [56]

Answer:

Pls take a clearer picture or type down the values pls. Is angle D=6x+3 or something else?

8 0

3 years ago

Identify if the expressions below are polynomials or not for each of them.

monitta

The polynomials can´t contain:

-Variables in the exponents of the terms.
-Variables in the denominator.
- Negative exponents.
-Fractionals exponents.
-The variables cant be as radicals.

Therefore:

a) It is a polynomial (The variable is under a radical)
b) It is not a polynomial.
c) It is a polynomial.
d) It is not a polynomial. (It has a variable in the denominator).
e) It is a polynomial.
f) It is not a polynomial. (It has a variable in the denominator).

4 0

3 years ago

3(x-5)=18 solve this=

Lunna [17]

3 (x-5) = 18
3x - 15 = 18
3x = 18 + 15
= 33
x = 11

I hope this helped! :)

4 0

3 years ago

Solve the system of linear equations. - 3x + 5y = 13 x + 4y = -10

Molodets [167]

Answer:

(-6,-1)

Step-by-step explanation:

5 0

3 years ago

Suppose that time spent on hold per call with customer service at a large telecom company is normally distributed with a mean µ

lana66690 [7]

Answer:

0.3108 is the probability that the sample mean is between 7.8 and 8.2 minutes.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 8 minutes

Standard Deviation, σ = 2.5 minutes

Sample size, n = 25

We are given that the distribution of time spent is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling =

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{2.5}{\sqrt{25}} = 0.5$

P(sample mean is between 7.8 and 8.2 minutes)

$P(7.8 \leq x \leq 8.2)\\\\ = P(\displaystyle\frac{7.8 - 8}{0.5} \leq z \leq \displaystyle\frac{8.2-8}{0.5})\\\\ = P(-0.4 \leq z \leq 0.4})\\\\= P(z < 0.4) - P(z < -0.4)\\\\= 0.6554 -0.3446= 0.3108$

0.3108 is the probability that the sample mean is between 7.8 and 8.2 minutes.

4 0

4 years ago