The problem is that at the end, you owe $480, so what you have is -$480 (instead of the $480 that is written on the riddle). And when your friend gives back the $30, you will owe $450, meaning that you have
-$450.
Where is the problem in the math?
Let's follow what you say with the proper equations.
Both your parents gave you $250, so now you have:
$250 + $250 = $500
Then you bought a phone for $450, so now you have:
$500 - $450 = $50
Then you gave $30 to your friend, so now you have:
$50 - $30 = $20
Then you gave $10 to each one of your parents, so now you have:
$20 - $10 - $10 = $0.
Now, each one of your parents wants the $240 ($250 - $10) back.
So you OWE $480 (you do not have $480, you owe it, here is the problem with the riddle reasoning).
It will be represented with a negative number:
-$480
When your friend gives you the $30 back, you add it to the above value (meaning that you give it to your parents):
-$480 + $30 = -$450
Now you owe $450 to your parents, which is the cost of the cellphone that you bought.
If you want to learn more about math reasoning, you can read:
https://brainly.com/question/25870256
good morning to you all! can someone please answer this, ill give you brainliest and your earning 50 points.
Some natural hazards are preceded by geologic activities that allow for reliable predictions; other natural hazards occur suddenly, with no notice, and are not yet predictable.
TrueThere are some disasters that can be predicted like tornadoes, tsunamis etc.. But some hazards like earthquake cannot be predicted. Still the technology has not developed so much that it could predict earthquakes...~
Answer:
True
Explanation:
Yes we became modern a lot and are too ahead in terms of technology .We can predict cyclones way before it happens .We can predict tornadoes by measuring air pressure.But we are still unable to predict some hazardous things such as earth quake.Which factors affect the electrical force between two objects?.
Answer:
the distance between the particles and the amount of electric charge that they carried.
Explanation:
hope this helps
Answer: charge and distance between them
Explanation:
At what point is the speed at a maximum? .
A. Just before the skater reaches the very bottom
B. At the exact bottom
C. A little bit after reaching the bottom
Answer:
B. At the exact bottom
Explanation:
This is because his acceleration is at its max, which means his speed is at a max. HOPE THIS HELPS!
Answer:
B, At the exact bottom
Explanation:
i got it right
Exercise 3: A van of mass 1200kg was moving at a velocity of 8m/s when it was involved in a head on collision with a lorry moving in the opposite direction. Assuming that the van came to stop after the collision,
We need momentum
mass=1200kgVelocity=8m/s[tex]\\ \rm\Rrightarrow Momentum=Mass\times Velocity [/tex]
[tex]\\ \rm\Rrightarrow Momentum=1200(8)[/tex]
[tex]\\ \rm\Rrightarrow Momentum=9600kgm/s[/tex]
a certain conductor has a resistnace of 200 ohms. What potential difference is required across the conductor in order to cause a current of 0.5 A to flow through it.
Answer:
100 volts
Explanation:
V= IR
V= 0.5×200
V= 100 volts
What is the mass of an object if a force of 48 Newtons produces an acceleration of 6 m/s2?
Answer:
m = 8 kg
Explanation:
According to Newton's second law of motion, F = ma.
Solving for m using algebra:
m = F ÷ a
m = 48 N ÷ 6 m/s² = 8 kg
Dr. Cronbach wants to be sure that his assessment of neuroticism measures the same way each time he uses it. Which aspect of assessment is Dr. Cronbach primarily concerned with?
The aspect of assessment that Dr. Cronbach is primarily concerned with is the internal consistency.
Reliability assessmentA reliability assessment is a tool that is used to evaluate the consistent performance of an individual or an instrument.
When this assessment is carried out in such a way that the instrument gives the same result each time it is used, the internal consistency is being considered.
Therefore, the aspect of assessment that Dr. Cronbach is primarily concerned with is the internal consistency.
Learn more about reliability assessment here:
https://brainly.com/question/3733655
How is thermal equilibrium reached? Question 3 options: When both objects have the same temperature When objects have the same mass When objects are both in the same state of matter (solid, liquid, or gas) When objects have different temperatures.
In the thermal equilibrium, the change in temperature is said to be zero in between the bodies. Thermal equilibrium is reached when both objects have the same temperature.
What is thermal equilibrium?Thermal equilibrium is easily explained by the zeroth law of thermodynamics. If any two-body is at thermal equilibrium there is no change in the temperature of the body.
According to zeroth law if body A is in thermal equilibrium with body B and body B is in thermal equilibrium with C . So body A and C are also in thermal equilibrium.
In the thermal equilibrium, the net heat transfer is said to be zero in between the bodies.
Hence option A IS RIGHT. Thermal equilibrium is reached when both objects have the same temperature
To learn more about the thermal equilibrium refer to the link;
https://brainly.com/question/2637015
A 26.5 kg crate is pushed with a force of 1,893 N, moving the crate a distance of 13.0 m. 579 W of power was used. For how much time was the force applied
Explanation:
[tex]t = \frac{f \times d}{p} [/tex]
t = ?
f = 1893N
d = 13m
P = 579W
t = { 1893×13}/(579)
t = 42.5secs
The panel of solar cells transform ______________ energy into electrical energy.
Answer: The panel of solar cells transforms solar or sunlight energy into electrical energy.
Explanation:
The panels take the visible light waves emitted from the sun and convert them into electricity.
Answer:
sunlight or solar it absorb sun energy
A star is moving away from an observer. Toward which end of the spectrum does its visible light shift?.
Answer:
Redshift, or lower power
Explanation:
doppler effect
waves get stretched when you are moving away from something, and squished when you are moving towards it. Imagine you have a long, bent wire. if you stretch out the wire, the wavelength becomes longer. This also applies to sound.
true or false? Sound travels faster trough water than air
Answer:
true
Explanation:
Sound travels faster in water compared with air because water particles are packed in more densely.
How much force is need
to accelerate a 50 kg
object 20 m/s2?
Answer:
F = 1000 N
Explanation: When calculating force, F=ma.
So...
F = (50)(20)
1000 = (50)(20)
Savanna regions developed during the Triassic period. Please select the best answer from the choices provided T F.
The statement 'savanna regions developed during the Triassic period' is TRUE. It is a type of biome.
What is a Savana?A savanna is a type of grassland biome located on low latitudes, in which grasses are the dominant vegetation.
Savana biome is characterized by warm temperatures all year and high levels of precipitation during the summer.
Moreover, the Triassic period is a geological period that ended 145 million years (Mya) ago.
Learn more about the Savana biome here:
https://brainly.com/question/15443381
Answer:
true
Explanation:
can someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
Social cost is the answer
:D let's hope that helped
Explanation:
How does wind affect the amount of rain?
3 or sentence
Explanation:
Hope it helps you!!If we add 50 Joules of thermal energy to a heat engine, and that heat engine does 30 Joules of work, how much thermal energy is left over?
20 Joules
10
None
All of it
Answer:
The correct answer should be
A. 20 Joules
Explanation:
I'm taking the K12 Unit Test: Energy - Part 1 right now
Explain why the moon appears illuminated
On a warm summer day when the relative humidity is high, it may seem even warmer than the actual temperature. Why do we feel so uncomfortable on these muggy days?
Answer:
Condensing
Explanation:
Water density in the air is too high for condensation to occur and so you feel warm, sweaty, and sticky due to the added moisture on your body.
People who have color vision deficiency typically lack one or more of the three cones that are sensitive to a particular wavelength. Please select the best answer from the choices provided T F.
The given statement is true. People who have color vision deficiency typically lack one or more of the three cones that are sensitive to a particular wavelength.
What is color blindness?The incapacity to determine the exact shades of color is known as color vision insufficiency. This optical disorder is also referred to as "color blindness," however only a few people are actually color blind.
The sensitivity of color-blind people towards a particular wavelength is high. They are more sensitive to a particular wavelength.
So People who have color vision deficiency typically lack one or more of the three cones that are sensitive to a particular wavelength.
Hence the statement is true.
To learn more about color blindness refer to the link;
https://brainly.com/question/25621649
A tennis ball has 10 J of energy when it is 1 m above the floor.
Name the store associated with this
energy.
The store associated with the energy when a ball has 10 J of energy when it is 1 m above the floor is gravitational potential energy
What is gravitational potential energy?
Gravitational potential energy is the energy of a body by virtue of its position in the gravitational field.
From the question, If a tennis ball has 10 J of energy when it is 1 m above the floor, first, a work of 10 J was done against gravity to lift the tennis from the floor to a height of 1 m. At the height of 1 m, the work of 10 J is converted to the gravitational potential energy of the tennis ball which is stored in the ball.
Hence, The energy associated when a tennis ball has 10 J of energy and it is 1 m above the floor is gravitational potential energy.
Learn more about gravitational potential energy here: https://brainly.com/question/15896499
When energy is added to a wave, how can the wave change? Select all that apply
A The amplitude can increase
B
The frequency can increase
C
The amplitude can decrease.
D
The frequency can decrease
E
The wavelength can increase.
F
The wavelength can decrease.
Answer:
c is the right answer to this
Four spheres with positive and negative charges hang from strings.
Which illustration correctly shows how the spheres will behave?
A
B
C
D
The charges may be positive or negative. However, the behavior of the charges depend on the position of like charges and unlike charges.
What is a charge?An electrical charge may be positive or negative. We must recall that a charge may attract or repel another charge. According to the first law of electrostatics, like charges repel while unlike charges attract.
The image is not shown here however, the behavior of the charges depend on the position of like charges and unlike charges.
Learn more about charges:https://brainly.com/question/2697602
witch two conditions would result in the weakness electric force between objects
Answer: the greater the electric force. distance between the charges.
Explanation:
The greater the charge, the greater the electric force. The second factor is the distance between the charges.
Define force as the cause of acceleration?
Physics
Answer:
In short, a force applied to an object at rest causes it to accelerate in the direction of the force.
Explanation:
Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e. to change its velocity, at a constant rate.
Answer:
As the force acting upon an object is increased, the acceleration of the object is increased.
Explanation:
The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.
An electrostatic force of 9.0 N ??
[tex]\longrightarrow \sf D) 9.0 \times 10^6 N/C [/tex]
Solution:-Given -
force,F = 9.0 NCharge,q = +1.0[tex]\mu[/tex]Force,F on any charge q in electric field,E is given by -
[tex]\green{ \underline { \boxed{ \sf{F = qE}}}}[/tex]
[tex]\therefore \sf E = \dfrac{F}{q} [/tex]
Putting Values -
[tex]\begin{gathered}\\\implies\quad \sf \dfrac{9}{1 \times 10^{-6}} \quad(1\mu = 10^{-6}) \\\end{gathered} [/tex]
[tex]\begin{gathered}\\\implies\quad \sf 9 \times 10^{6} N/C \\\end{gathered} [/tex]
how much mass does the sun have? <33
Explanation:
1.989 × 10^30 kg
1.989 × 10^30 kg
6. What is the GPE of a 500g box of chocolates 2 m above the ground?
explain what Is meant by the term potential energy and give four different examples of potential energies?
the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
A book on a table before it falls.
A child at the top of a slide.
Ripe fruit before it falls.
River water at the top of a waterfall.
Which is one difference between visible and non-visible light.