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3 years ago

Jenna flips two pennies 105 times how many times can she expect those coins to come up heads

1 answer:

7 0

The more observations you make the closer and closer the experimental probability will approach the theoretical probability. In this case the theoretical probability is:

P(HH)=(1/2)(1/2)=1/4

So in 105 trials one would expect to get two heads:

105(1/4)=26.25 times.

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Solve for X:

galben [10]

Answer:

A. -61/9

Step-by-step explanation:

(7x + 28) + (7x +28) = 5x - 5 . . . . . . . given equation

14x +56 = 5x -5 . . . . . . . . . . . . . . . . . collect terms

9x = -61 . . . . . . . . . . . . . . . . . . . . . . . . subtract 5x+56

x = -61/9 . . . . . . . . . . . . . . . . . . . . . . . . divide by the coefficient of x

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3 years ago

Read 2 more answers

An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est

MrRa [10]

Answer:

85% level of the confidence interval is

(26.337, 26.662)

Step-by-step explanation:

Explanation:-

Given the size of the sample 'n' = 295

Mean of the sample x⁻ = 26.5

The Standard deviation of the Population = 2.7

85% level of the confidence interval is determined by

$(x^{-} - Z_{0.15} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.15} \frac{S.D}{\sqrt{n} })$

Critical value Z₀.₁₅ = 1.036

85% level of the confidence interval is determined by

$(x^{-} - Z_{0.15} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.15} \frac{S.D}{\sqrt{n} })$

$(26.9 -1.036 \frac{2.7}{\sqrt{295} } , 26.5 + 1.036 \frac{2.7}{\sqrt{295} })$

( 26.5 - 0.1628 , 26.5+0.1628)

(26.3372,26.6628)

7 0

3 years ago

2. The graph of a certain geometric sequence can be described as a curve increasing from left to right. Which sequence would hav

kozerog [31]

Answer:

0 (-1,2,-4, 8, -16) that should help you

Step-by-step explanation:

8 0

3 years ago

Write a real-world problem that can be represent 3x + 6 > 27

Anestetic [448]

3 customers times the amount of cups plus 6 dollars in change is less than 24.

3 0

2 years ago

In a survey at a local university, 45% of students say that they get less than the recommended eight hours of sleep per night. I

vlabodo [156]

Answer: In a survey at a local university, 37% of students say that they get less than the recommended eight hours of sleep per night. In a group of 2200 students, how many would you expect get eight or more hours of sleep per night?

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Answer by macston (5194) About Me (Show Source):

You can put this solution on YOUR website!

If 37% get less than 8 hours of sleep, 100%-37%=63%

63% get 8 hours or more per night:

(0.63)(2200)=1386

ANSWER: You would expect 1386 to get 8 or more hours of sleep per night.

This is an equation! Solutions: x=1.

Graphical form: Equation 3%2Ax-x%2B2=4 was fully solved.

Text form: 3*x-x+2=4 simplifies to 0=0

Cartoon (animation) form: simplify_cartoon%28+3%2Ax-x%2B2=4+%29

For tutors: simplify_cartoon( 3*x-x+2=4 )

If you have a website, here's a link to this solution.

3 0

2 years ago