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yaroslaw [1]
3 years ago
13

Maria wanted to know if there was a connection between her coffee consumption and how well she slept that night. For weeks, Mari

a recorded how many cups of coffee she drank in the morning and how many hours she slept that night.
What is the probability that a randomly selected day is one when she slept exactly 7 hours given that the day is one when she drank exactly 1 cup of coffee? (serious answers only please)

A. 3/15
B. 3/10
C. 7/15
D. 7/10

Mathematics
1 answer:
____ [38]3 years ago
6 0

Answer:

A

Step-by-step explanation:

I did this

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A group of adults and students went on a class trip to Washington, DC. The number of male students was 1 more than 7 times the n
algol [13]
Alright.
So let's say the number of adults is x.
Therefore, the number of boys is 7x + 1.
And then the total amount of girls is 3.5x + 0.5
So then:
x + 7x + 1 + 3.5x + 0.5 = 82
11.5x + 1.5 = 82
11.5x = 80.5
x = 7
So now we can figure out the number of male and female students.
Male students = 7x + 1
7*7 + 1
49 + 1
50
Male Students = 50
Female students = half of 50
50/2 = 25
Female Students = 25
4 0
3 years ago
If you owe your friend $3 and you have $15, which expression would help you find out how much money you would have left?
gizmo_the_mogwai [7]
The answer is B because your subtracting it
7 0
3 years ago
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What is the exact volume of the cylinder? enter your answer, in terms of pi, in the box.
Dominik [7]

Answer:

Step-by-step explanation:

r = 8 in

h = 5 in

Volume of cylinder = πr²h

                                = π * 8 * 8* 5

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7 0
3 years ago
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I have 3 different ones now. I apologize for the relentless questions.
Minchanka [31]

Answer:

\frac{1}{4x}

Step-by-step explanation:

The negative exponential can be represented with the help of fractions. By this way, we also make the negative exponential disappear. For example, we can write:

a^{-1} = \frac{1}{a}

The explanation is this:

Since a^{0}=1, \frac{1}{a}=\frac{a^{0} }{a^{1} } = a^{0-1} =a^{-1}

According to this definition, we can simplify our problem in the following way:

(4x)^{-1} = \frac{1}{(4x)^{1} } = \frac{1}{4x}

5 0
3 years ago
Quick question. solve for x. show all work
kkurt [141]
75.................................
6 0
3 years ago
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