John believes that the amount of sleep he gets the night before a test and his score on that test are inversely related. On his first exam, he got eight hours of sleep and scored 70 on the exam. To the nearest tenth, how many hours does john believe he must sleep the night before his second exam so that the average of his two exam scores is an 80?.

Answers

Answer 1

John will need to sleep for 10.3 hours before  his second exam so that the

average of his two exam scores is an 80.

We were given

8 hours of sleep = 70

To get average of 80

70+ x = 80

  2

Cross multiply:

70+x = 160

x= 160-70

 = 90.

If  8 hours of sleep = 70

       x hours of sleep = 90

Cross multiply

8× 90 = 70 × x

720 = 70x

x = 720/70

x  = 10.2857

    ≈ 10.3 hours of sleep

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Related Questions

Which of the following lists includes only organisms composed of cells?.

Answers

Answer:

last one

Explanation:

protists, bacteria, plants

Boyle’s law states that if the temperature of an ideal gas is held constant, then the pressure p of the gas and its volume v satisfy the relationship p=kv, where k is a constant. Which of the following best describes the relationship between the rate of change, with respect to time t, of the pressure and the rate of change, with respect to time t, of the volume?.

Answers

The best answer that describes the relationship between the rate of change with respect to time of the pressure and the rate of change with respect to time t of the volume is; dP/dt = (-k/V²)(dV/dt)

We are given;

p = k/v

Thus if we cross multiply, we will get;

PV = k

Where;

P is pressure

V is volume

k is a constant

Using the product rule of differentiation on both sides with respect to time t gives;

V(dP/dt) + P(dV/dt) = 0

This is because k is a constant.

Putting k/v for P gives;

V(dP/dt) + (k/V)(dV/dt) = 0

>> V(dP/dt) = - (k/V)(dV/dt)

Divide both sides by V by division property of equality to get;

dP/dt = (-k/V²)(dV/dt)

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This cell is undergoing a step of meiosis i. What step is the cell in? the begining of prophase i the middle of metaphase i the end of anaphase i the middle of telophase i.

Answers

Answer:

Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms used to produce the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each chromosome.

Explanation:

Answer:

answer is B

the middle of metaphase I

Explanation:

hope this helps!

Which of these might affect how an age-of-consent law.

Answers

thiers no choices to chose from.

What is the speaker’s mood in this excerpt? unhappy playful childish determined.

Answers

Answer: playful

Explanation:

The speaker’s mood in the given excerpt is playful. Thus, the correct option for this question is B.

What is Speaker's mood?

The speaker's mood may be defined as the mood of a character in a story is the attitude of the character towards a situation of another character. The speaker's mood is the general feeling or atmosphere that a piece of writing creates within the reader.

In the given excerpt from "Mending Wall," the speaker has a playful mood towards his neighbor and the situation where he was asked to build a wall, and he doesn't understand what is the point. To express his point of view he asks questions and has a playful attitude.  

Therefore, the speaker’s mood in the given excerpt is playful. Thus, the correct option for this question is B.

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Your question seems incomplete. The most probable complete question is as follows:

Read the excerpt from "Mending Wall." Spring is the mischief in me, and I wonder If I could put a notion in his head: “Why do they make good neighbors? Isn’t it Where there are cows? But here there are no cows. Before I built a wall I’d ask to know What I was walling in or walling out, And to whom I was like to give offense. Something there is that doesn’t love a wall, That wants it down.” I could say “Elves” to him, But it’s not elves exactly, and I’d rather He said it for himself. What is the speaker’s mood in this excerpt?

unhappyplayful childish determined.

A reaction was found to be zero order in a. Increasing the concentration of a by a factor of 3 will cause the reaction rate to.

Answers

Answer:

Where is the choices

Explanation:

please send it in comment section

Which of the following costs are relevant to a make-or-buy decision?.

Answers

Answer:

im not sure thanks

Explanation:

AAHHHH so guilty........................... comment/ answer

Answers

Hmmmmmmmmmmmmmmmmmmm

Which of the following processes suggest that matter is made up of minute particles.

Answers

Answer:

the answer is evaporation

Explanation: Evaporation is the process by which a liquid transforms into vapor (a gas). When some material is in its liquid phase, its particles are really close together (but not as much as we would see in a metal). As the temperature of the liquid increases, also does the kinetic energy of the particles. This cause the particles in the water to move a lot faster, thus its oscillations are larger. This causes an increase in the volume of the material.

Two congruent squares are shown in figures 1 and 2 below.

Answers

The combined area of the shaded triangles in Figure 1 is equal to the combined area of the shaded triangles in Figure 2. The area of the unshaded square in Figure 1 can be represented by . The combined area of the two unshaded squares in Figure 2 can be represented by . The areas of the squares in Figure 1 and Figure 2 show that .
Given :
Figure 1 and figure 2 are given.
The combined area of the shaded triangles in Figure 1 is equal to the combined area of the shaded triangles in Figure 2.
The area of the unshaded square in Figure 1 can be represented by .
The combined area of the two unshaded squares in Figure 2 can be represented by .
The areas of the squares in Figure 1 and Figure 2 show that .

which expression is equivalent to a+4a+8a+4a+8

Answers

Answer:

17a+8

Explanation:

combine like terms (all of the A's) and then the rest of the equation (8)

Answer:

17a+8

Explanation:

Read the passage from when birds get flu and cows go mad! by john diconsiglio. Perhaps the best news about mad cow is that people do not catch it easily. Chances are, millions of people have eaten infected beef. But, for reasons scientists still do not understand, only about 150 people have gotten vcjd and died from it. The tone of the passage is anxious. Excited. Reassuring. Unhappy.

Answers

Answer:

anxious

Explanation:

that's that I think at least

The tone of the passage is Reassuring. Check more about tone below.

What does reassuring means?

The term reassuring is one that means to restore hope or confidence in a particular thing or outcome.  

Conclusively, Note that in the text,  The tone of the passage is Reassuring.  because the author stated that "the best news about mad cow is that people do not catch it easily", therefore assuring the people.

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Caleb draws two triangles and claims that the triangles are congruent.

Answers

Answer:

your question needs more description or an image. I'll help if you comment the rest of the question.

Explanation:

What does this excerpt tell us most about the cat? she sleeps a lot. She is content. She feels cold. She is unconcerned.

Answers

Answer:

The answer is d and to check your self here is the passage

Last of all came the cat, who looked round, as usual, for the warmest place, and finally squeezed herself in between Boxer and Clover; there she purred contentedly throughout Major's speech without listening to a word of what he was saying.

Explanation:

In "Lather and Nothing Else," the line "feigning casual unconcern" reveals the following about the narrator's feelings.

What "Feigning casual unconcern" shows?

"Feigning casual unconcern" shows that the narrator is really nervous about the man whose beard he has to shave, but he has to pretend that everything is fine.

"Lather and Nothing Else" is a short story by Hernando Tellez. It is set in Colombia during a civil war. The narrator of the story is not only a barber, but also a revolutionary. One day, a captain comes in to be shaved by the narrator. That man was responsible for the horrific killing and mutilation of four rebels.

The narrator is extremely nervous about the man's presence in his shop. After all, even if he is a client, he is also the enemy.

That is what the line below shows:

"I lifted the brush, and feigning casual unconcern, asked, 'Firing Squad?'"

The narrator is pretending to be unconcerned, but he is, in reality, disoriented and even shaking.

Therefore, In "Lather and Nothing Else," the line "feigning casual unconcern" reveals the following about the narrator's feelings.

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A cart with an unknown mass is at rest on one side of a track. A student must find the mass of the cart by using newton’s second law. The student attaches a force probe to the cart and pulls it while keeping the force constant. A motion detector rests on the opposite end of the track to record the acceleration of the cart as it is pulled. The student uses the measured force and acceleration values and determines that the cart’s mass is 0. 4kg. When placed on a balance, the cart’s mass is found to be 0. 5kg. Which of the following could explain the difference in mass?.

Answers

Answer:

The track was not level and was tilted slightly downward.

Explanation:

The track was not level and was tilted slightly downward.

Food that has been prepared or handled should never be placed on the salesfloor before it has been.

Answers

Food that has been prepared or handled should never be placed on the sales floor before it has been properly chilled to ensure the internal temperature is 10° (51°F) or less. It is important to avoid contamination.

It is important to have into account that the higher the temperatures; the faster food will decompose.

Pathogenic microorganisms (such as fungi and bacteria) can reproduce and grow at temperatures as low as 40°F.

The foods may deteriorate even in absence of noticeable modifications in odor, appearance and/or taste.  

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Which change will decrease the electric force between two positively charged objects?.

Answers

By increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.

At midday, what is happening in the leaf of a plant?.

Answers

photosynthesis.
with the energy from the sun, the plant is growing more and more cells.

All of the following duties are responsibilities of county government officials except __________.

Answers

Answer: regulating public service corporations

Explanation: due to it being public

The new clients are not responding to our product the way we had hoped. - frankly, i’m hardly with last month’s sales.

Answers

Based on the information given, it can be noted that the word that will accurately fit into the sentence will be "beside myself".

Based on the complete information, it should be noted that one cannot use cloud nine, over the moon, or down in the dumps as they do not fit accurately into the sentence.

Therefore, the correct sentence will be that the new clients are not responding to our product the way we had hoped. Frankly, i’m hardly beside myself with last month’s sales.

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Two customers took out loans from a bank. • henry took out a 4-year loan for $5,000 and paid 4. 2% annual simple interest. • ingrid took out a 6-year loan for $5,000 and paid 3. 9% annual simple interest. What is the difference between the amounts of interest henry and ingrid paid for their loans?.

Answers

Explanation:

Step-by-step explanation:

The formula for determining simple interest is expressed as

I = PRT/100

Where

I represents interest paid on the loan.

P represents the principal or amount taken as loan

R represents interest rate

T represents the duration of the loan in years.

Considering Henry's loan,

P = 5000

R = 4.2

T = 4 years

I = (5000 × 4.2 × 4)/100 = $840

Considering Ingrid's loan,

P = 5000

R = 3.9

T = 6 years

I = (5000 × 3.9 × 6)/100 = $1170

The difference between the amounts of interest Henry and Ingrid paid for their loans is

1170 - 840 = $330

Alissa works for a wireless company, and she prides herself on the fact that her job duties help keep the emergency service phone line operating, which ultimately saves lives. Alissa’s sentiment reflects.

Answers

Considering the situation described above, Alissa’s sentiment reflects task significance.

What is Task Significance?

Task Significance is the mental perception in which individuals consider their work view as significantly influencing other people's lives both within and outside the company.

How Task Significance is Applicable here

Given that Alissa believes that her job duties help keep the emergency service phone line operating, this is an example of the Task Significance phenomenon.

Hence, in this case, it is concluded that the correct answer is "Task Significance."

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Incisors (front teeth) act as wedges in the human body. Which change would increase the mechanical advantage of incisors? a decrease in the distance of the teeth from the fulcrum an increase in the distance of the teeth from the fulcrum an increase in the thickness at the widest part of the teeth and no change in the length of the teeth an increase in the length of the teeth and no change in the thickness at the widest part of the teeth.

Answers

Based on the information given about the wedge, the option that will increase the mechanical advantage of incisors is D. an increase in the length of the teeth and no change in the thickness at the widest part of the teeth.

A wedge simply means a triangular shaped tool that's used as a simple machine. It is used for the separation of objects.

It should be noted that Incisors (front teeth) act as wedges in the human body and there can be an increase the mechanical advantage of incisors when there's an increase in the length of the teeth and no change in the thickness at the widest part of the teeth.

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Answer:

D

Explanation:

EDGE 22

What happens to the temperature of an object when the particles are moving faster.

Answers

Answer:

heat is increased

Explanation:

this increases the kinetic energy of particles inside an object , and they collide on the walls of an object

A compound is broken down by chemical means during.

Answers

Answer:

"broken apart in chemical reactions called decomposition reactions"

Explanation:

So, Compounds can be broken apart in chemical reactions called decomposition reactions. For example, water can be broken down into the diatomic elements hydrogen gas and oxygen gas in a chemical reaction called electrolysis. ... Some compounds undergo thermal decomposition when they are heated

I love y’all so literally here’s 100 points

Answers

Thanks
Feel free to ask any questions with school

glad to help :))))

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What is an equation of a parabola with the given vertex and focus (-2 5) (-2 6).

Answers

Equation of parabola is
4
y
=
x
2
+
4
x
+
24
Explanation:
As the vertex
(

2
,
5
)
and focus
(

2
,
6
)
share same abscissa i.e.

2
, parabola has axis of symmetry as
x
=

2
or
x
+
2
=
0
Hence, equation of parabola is of the type
(
y

k
)
=
a
(
x

h
)
2
, where
(
h
,
k
)
is vertex. Its focus then is
(
h
,
k
+
1
4
a
)
As vertex is given to be
(

2
,
5
)
, the equation of parabola is
y

5
=
a
(
x
+
2
)
2
as vertex is
(

2
,
5
)
and parabola passes through vertex.
and its focus is
(

2
,
5
+
1
4
a
)
Therefore
5
+
1
4
a
=
6
or
1
4
a
=
1
i.e.
a
=
1
4
and equation of parabola is
y

5
=
1
4
(
x
+
2
)
2
or
4
y

20
=
(
x
+
2
)
2
=
x
2
+
4
x
+
4
or
4
y
=
x
2
+
4
x
+
24
graph{4y=x^2+4x+24 [-11.91, 8.09, -0.56, 9.44]}

What is essential to delivering a successful presentation.

Answers

Enthusiasm and Honesty. One of the most painful things in a presentation is listening to a presenter who is clearly bored and uninterested in the topic. ...
Focused on the Audience. ...
Ability to Keep Things Simple. ...
Being Personable. ...
Great Body Language.

Answer:

The principles of good communication.

Explanation:

Got it right on the quiz.

When you add hot water to cold water the cold water warms up because of

Answers

Okay this is like Science or Chemistery, probably Sience

Answer:

So say you have some cold water running, if you turn on the hot water than the hot water will start coming too. The energy of the hot water will start warming up the cold water.

Explanation:

I don't really know, just tossing reasonable stuff out here.

how can you help someone believe in themselves again and please explain you answer

Answers

Live By Example. So, we've established by now that you're your own harshest critic. ...
Put It Into Words. ...
Show It In Other Ways. ...
Listen. ...
Challenge Them. ...
Encourage Them To Make Decisions And Take Steps.
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