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Liula [17]
3 years ago
15

Help click all the questions

Mathematics
2 answers:
Alik [6]3 years ago
8 0

Answer:1,grams 2,b 3, id k srry

Step-by-step explanation:

ra1l [238]3 years ago
3 0
8. A
9. B
10. B
(i think..)
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Marissa and Jarod plan to purchase DVD players with a regular price of $199.99. The DVD players are on sale for 25% off. Marissa
sergeinik [125]
<span>Marissa and Jarod plan to purchase DVD players with a regular price of $199.99. The DVD players are on sale for 25% off.
=> Marissa starts by calculating 25% of $199.99.
25% of 199.99 dollars
25% = 0.25
199.99 * .25 = 49.99 dollars
=> Jarod calculates 75% of $199.99.
75% = .75
199.99 * .75 = 149.99 dollars
Do both methods result in the same sale price? Explain.
The answer is NO. Marissa calculated for the discount which is 25% while Jarod calculated for the discounted price which is 75%</span>



3 0
3 years ago
The University of Washington claims that it graduates 85% of its basketball players. An NCAA investigation about the graduation
Nonamiya [84]

Probabilities are used to determine the chances of events

The given parameters are:

  • Sample size: n = 20
  • Proportion: p = 85%

<h3>(a) What is the probability that 11 out of the 20 would graduate? </h3>

Using the binomial probability formula, we have:

P(X = x) = ^nC_x p^x(1 - p)^{n -x}

So, the equation becomes

P(x = 11) = ^{20}C_{11} \times (85\%)^{11} \times (1 - 85\%)^{20 -11}    

This gives

P(x = 11) = 167960 \times (0.85)^{11} \times 0.15^{9}

P(x = 11) = 0.0011

Express as percentage

P(x = 11) = 0.11\%

Hence, the probability that 11 out of the 20 would graduate is 0.11%

<h3>(b) To what extent do you think the university’s claim is true?</h3>

The probability 0.11% is less than 50%.

Hence, the extent that the university’s claim is true is very low

<h3>(c) What is the probability that all  20 would graduate? </h3>

Using the binomial probability formula, we have:

P(X = x) = ^nC_x p^x(1 - p)^{n -x}

So, the equation becomes

P(x = 20) = ^{20}C_{20} \times (85\%)^{20} \times (1 - 85\%)^{20 -20}    

This gives

P(x = 20) = 1 \times (0.85)^{20} \times (0.15\%)^0

P(x = 20) = 0.0388

Express as percentage

P(x = 20) = 3.88\%

Hence, the probability that all 20 would graduate is 3.88%

<h3>(d) The mean and the standard deviation</h3>

The mean is calculated as:

\mu = np

So, we have:

\mu = 20 \times 85\%

\mu = 17

The standard deviation is calculated as:

\sigma = np(1 - p)

So, we have:

\sigma = 20 \times 85\% \times (1 - 85\%)

\sigma = 20 \times 0.85 \times 0.15

\sigma = 2.55

Hence, the mean and the standard deviation are 17 and 2.55, respectively.

Read more about probabilities at:

brainly.com/question/15246027

8 0
3 years ago
The slope of the line whose equation is x + y = 6 is
melisa1 [442]

Answer:

y= -x+6

Step-by-step explanation:

The equation was in point slope from, so you had to solve for y using inverse operations. The slope of x is -1 because -x = -1x.


6 0
3 years ago
Divide €132 in the ratio 7:4
Anon25 [30]

Answer:92.4

Step-by-step explanation:

4x+7x=132

10x=132

x=132/10

x=13.2

4x=4×13.2

=52.8

5x=7×13.2

=92.4

4 0
3 years ago
Classify the triangles the choices are equilateral,isosceles, scalene and right please help and be quick thanks
Digiron [165]

Answer:

Step-by-step explanation:

some off this is a tranggle

3 0
3 years ago
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