The solution to the system of equations is x = 30 and y = -36.
The two equations are known as simultaneous equations. The elimination method would be used to determine to find the solutions.
−3x−9y=18 equation 1
4x+3y=12 equation 2
In order to determine the value of x, take the following steps;
Multiply equation 2 by 3
12x + 9y = 36 equation 2
Add equation 1 and equation 2
x = 30
Substitute for x in equation 2
4(30) + 3y = 12
120 + 3y = 12
120 - 12 = -3y
108 = -3y
y = 108 / -3 = -36
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Answer:
x=6
y=-4
Explanation:
got it on khan <3
Research suggests that laughter improves people’s emotional and physical well-being. Write a research-based essay to inform the reader about the positive effects of laughter on emotional and physical health. Properly cite research evidence to inform the audience about the topic. << read less stylesnormal.
It has been scientifically proven that laughter is excellent for emotional and physical well-being. The laugh can relieve physical tension, enhance the functioning of the immune system and decreases stress hormones.
It has been shown that laughter can relax facial muscles, which is fundamental for relieving physical tension.
Moreover, it has also been demonstrated that laughter can increase the heart rate and boost the adaptive immune system by generating antibodies that fight against harmful infectious agents (e.g. bacteria and viruses).
Finally, laughter can also decrease the levels of stress hormones such as cortisol, adrenaline and growth hormones.
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Which statement best describes what energy transfer diagrams show?.
Answer:
Energy can change form, but the total amount of energy stays the same.
Which material is an aquifer layer most likely made of?.
[tex] \large \bold{Answer:-}[/tex]
An Aquifer layer is most likely made up of cracked rocks.
Answer:
D
Explanation:
cracked rocks make up this material.
Which expression is equivalent to sqrt 2x^5/18 assume.
Answer:
(x^2 * sq rt x)/3
Explanation:
first, simplify the 2x^5/18
you get x^5/9
square rooting 9 gives you 3
square rooting x^5 gives you x^2 * sqrt x
just put 3 in the denominator and x^2 * sq rt x in the numerator
ANSWER: (x^2 * sq rt x)/3
Which of the following may be allowed in a food preparation area.
Among the listed items, the one that may be allowed in a food preparation area is;
Wedding Band.Food preparation can be regarded as the process of preparing food which may involve cooking and other activities.
However,, the place of cooking should be hygienic and contaminating items should be do away with.
Therefore, Among the listed items, the one that may be allowed in a food preparation area is;
Wedding Band.CHECK THE COMPLETE QUESTION BELOW;
the one that may be allowed in a food preparation area: Smoking, Chewing Gum, Pets, Wearing a Wedding Band
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in what 3 ways did the presidential election process change as a result of the election of 1800?
What is the minimum hot holding temperature requirement for macaroni and cheese.
Answer:
165 - 180°F
Explanation:
For macaroni and cheese, a minimum hot holding temperature of 165° to 180° Fahrenheit (F) for 15 seconds is required.
What is the required minimum holding temperature for mac cheese?"Macaroni and Cheese and Premium Macaroni and Cheese" are already cooked and only need to be warmed to 165°F before serving and kept warm.
This can be done by:
1. Boiling them in a bag
2. Heating them on the stove
3. Heating them in the microwave
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Which statement describes the 3d, 4s, and 4p orbitals of arsenic (as) based on its electronic configuration and position in the periodic table?.
The statement that describes the 3d, 4s, and 4p orbitals of arsenic (as) based on its electronic configuration and position in the periodic table is; The 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.
The electronic configuration of arsenic is given as; 1s² 2s² 2p^(6) 3s² 3p^(6) 4s² 3d^(10) 4p³.
Now we can see that in that electronic configuration the orbitals are, s, p and D.
Now, the maximum electrons for each of the 3 orbitals are;
Maximum electrons for d orbital = 10 electrons
Maximum electrons for s orbital = 2 electrons
Maximum electrons for p orbital = 6 electrons.
Now, when we compare the maximum number of electrons for each orbital to the ones in electron configuration of arsenic, it is clear from the last 3 orbitals that the 3d and 4s orbitals are completely filled while the 4p orbital is half filled or partially filled.
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Maya is playing a trivia game with multiple choice questions. Each question has 222 correct answers among 555 answer choices. Maya has no idea what the answers to a certain question are, so she needs to choose two different answers at random. What is the probability that maya's first guess is correct and her second guess is incorrect? round your answer to two decimal places.
The probability that maya's first guess is correct and her second guess is incorrect is 0.24
From the question given above, the following data were obtained:
Correct answer (C) = 222Total answer = 555Incorrect answer (I) = 555 – 222 = 333Next, we shall determine the probability that her 1st guess is correct.
Correct answer, nC = 222Total answer, nS= 555Probability of correct answer, P(C) =?P(C) = nC / nS
P(C) = 222 / 555
Next, we shall determine the probability that her 2nd guess is incorrect
Incorrect answer, nI = 333Total answer, nS = 554Probability of incorrect answer, P(I) =?P(I) = nI / nS
P(I) = 333 / 554
Finally, we shall determine the probability that her first guess is correct and her second guess is incorrect.
Probability of correct answer, P(C) = 222 / 555Probability of incorrect answer, P(I) = 333 / 554Probability of 1st correct and 2nd incorrect, P(C n I) =?P(C n I) = P(C) × P(I)
P(C n I) = (222 / 555) × (333 / 554)
P(C n I) = 0.24
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Answer: 3/10 or 0.3
Explanation: P(1st correct AND 2nd incorrect)= 2/5 • 3/4= 3/10 or 0.3
Describe a strange dream that you have seen recently.
When describing a strange dream that you had, there are several ways to go about it and this is one:
First introduce yourself into the story. Talk about how you fell asleep. Slowly guide the text into the dream. Talk about the different scenes in the dream and end it on the scene that felt the strangest to you. Explain why this was strange.Writing an essay can be academic dishonesty so I will walk you through how to write one yourself.
Steps in the essayIntroducing yourself does not mean saying your name. You can simply use the pronoun, "I." Talk about what you were doing, for instance, walking home, or watching television.
Then talk about how you fell asleep - could be in your bed, on a seat on the bus, or even on a sitting room couch.
Then begin to talk about how the dream started. Talk about how the dream began and then progressed till you get to the strange events.
Talk about these strange events and end on the strangest; then explain why this scene was strange if it isn't apparent.
ConclusionIt is best to either use little detail or a lot of detail, avoid the middle ground.
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Which of the following is a possible long-term consequence of two organisms occupying the same niche? a. Local extinction b. Cooperation c. Interbreeding d. Coexistence please select the best answer from the choices provided a b c d.
Answer:
Niche refers to the role of the microorganism or a living thing in an ecosystem. When two organisms occupying the same niche, the possible long-term consequence isA. local extinction. This is because the relationship is competition which can outlast the other. Eventually, when the environment is changed, the organisms adapt too which erases the original attributes.
Explanation:
HOPE ITS HELP YOU
When hydrogen reacts with calcium metal what are the oxidation number.
Answer:
the oxidation number is +2
Complete the two-column proof by providing the missing statements or reasons. Given: is rhombus prove:.
Answer:
Where is the two column proof?!
What was the outcome of the mexican revolution brainly.
Madeline was out at a restaurant for dinner when the bill came. Her dinner came to $13. After adding in a tip, before tax, she paid $15. 34. Find the percent tip.
15.34 - 13
=2.34
2.34 ÷ 15.34 × 100
=15.25%
The universal gas law, pv = nrt, describes the relationship among the pressure, volume, and temperature of a gas. P = pressure v = volume t = temperature (kelvin) n = number of moles (quantity of gas particles) r = universal gas constant at a constant temperature of 1 k, the pressure and volume of 1 mole of gas vary inversely. P = startfraction uppercase r over uppercase v endfraction use the values in the table to find the value of r. Es001-1. Jpg r =.
Answer:
8.31
Explanation:
just did it on edge 2021
Answer:
R= 8.31
Explanation:
Figure p12. 4 shows three uniform objects: a rod, a right triangle, and a square. Their masses and their coordinates in meters are given. Determine the center of gravity for the three-object system.
The center of gravity for the three-objects system is approximately located
at their center of mass.
The center of gravity of the three-object system is approximately (2.58, 4.75)Reasons:
The coordinates of the vertices of the objects and their masses are;
The rod:
Vertices, (2, 7), and (9, 7)
Mass, m₁ = 6.00 kg.
The right triangle;
Vertices; (4, 1), (8, 5), (8, 1)
Mass, m₂ = 3.00 kg.
The square
Vertices; (-5, 5), (-2, 5), (-2, 2), (-5, 2)
Mass, m₃ = 5.00 kg
Required;
The center of gravity for the three-object system.
Solution:
The center of gravity is given by the formula;
[tex]\displaystyle X_c =\mathbf{ \frac{X_{c1} \times m_1 +X_{c2} \times m_2 +X_{c3} \times m_3 }{m_1 + m_2 + m_3}}[/tex]
[tex]\displaystyle Y_c =\mathbf{ \frac{Y_{c1} \times m_1 +Y_{c2} \times m_2 +Y_{c3} \times m_3 }{m_1 + m_2 + m_3}}[/tex]
Where;
[tex]X_{c1}[/tex] = The x-coordinates of the center of the rod = 5.5
[tex]X_{c2}[/tex] = The x-coordinate of the centroid of the triangle [tex]\displaystyle = \frac{4 + 8 + 8}{3} = \frac{20}{3}[/tex]
[tex]X_{c3}[/tex] = The x-coordinate of the centroid of the square = (-5 - (-2)) ÷ 2 - 2 = -3.5
[tex]Y_{c1}[/tex] = The y-coordinate of the center of the rod = 7
[tex]\mathbf{ Y_{c2}}[/tex] = The y-coordinate of the centroid of the triangle [tex]\displaystyle = \frac{7}{3}[/tex]
[tex]Y_{c3}[/tex] = The y-coordinate of the centroid of the square = 3.5
Therefore;
[tex]\displaystyle X_c = \mathbf{ \frac{5.5 \times 6 +\frac{20}{3} \times 3 +(-3.5) \times 5 }{6+ 3 + 5}} \approx 2.58[/tex]
[tex]\displaystyle Y_c = \mathbf{ \frac{7 \times 6 +\frac{7}{3} \times 3 +3.5 \times 5 }{6+ 3 + 5}} = 4.75[/tex]
The center of gravity for the three-object system is ([tex]X_c[/tex], [tex]Y_c[/tex]) ≈ (2.58, 4.75)
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Which tools would you use to make chart 1 look like chart 2 in excel.
The tool to make chart 1 look like chart 2 in Microsoft Office Excel is the Chart Tools Design tab
The Microsoft Office Excel as several kinds of interchangeable charts that can be selected by the user.
Examples of charts
Some charts in Microsoft Office Excel are:
The column charts. The line charts. The bar charts. The area charts. And several others.Change charts
To change a chart from one form to another, you simply make use of the Chart Tools Design tab
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A 17 year old basketball player has collapsed on the court.
There are different reasons why players collapse in the court. It is therefore good that one knowns the right step to take. The scene is safe and the correct order of skills for lay rescuer adult CPR is Call 911, check for a pulse, start CPR.
Note that in the court, a player may collapse and it is very important to do the right thing. You can only perform the CPR , when you known how to do it. If you don't have the basic training on how to do it, do not attempt to do it. watching of videos on how to do it may help.
When doing CPR, always make sure you have to keep your elbows locked, and make sure to know who needs to do that role in this process. Be quick with it and do not be afraid of breaking bones.
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A 17-year-old basketball player has collapsed on the court. The scene is safe. What is the correct order of skills for lay rescuer adult CPR?
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Which of the following must exist in a population before natural selection can act upon that population?.
Answer:
) genetic variation among individuals
Eight less than four times a number is less than 56.
Answer:
depending on the number I think I could be wrong not 100%
The rock cycle forms new rocks using which of the following processes? a. Crystallization c. Erosion b. Compaction d. All of the above please select the best answer from the choices provided a b c d.
Answer:
The rock cycle describes how rocks change as a result of natural processes. The rock cycle forms new rocks using the crystallization, erosion and compaction processes. This makes the correct answer: D: all of the above. Igneous rocks for example are rocks formed from the crystallization( formation of rock crystals in cooling magma) of a liquid. Sedimentary rocks are formed by erosion. However, in order to form a sedimentary rock, the accumulated sediment must become compacted and cemented together.
You have 41. 6 g of o2 gas in a container with twice the volume as one with co2 gas. The pressure and temperature of both containers are the same. Calculate the mass of carbon dioxide gas you have in the container.
Answer: The mass of carbon dioxide is 28.6 grams
Explanation: Step 1: Data given
Mass of O2 = 41.6 grams
Volume of the O2 container = 2V
Volume of the CO2 container = V
Pressure and temperature are the same
Step 2: Ideal gas law
The ideal gas law = p*V=nRT
For O2: p*2V = n(O2)*R*T
For CO2: p*V = n(CO2)*R*T
n(O2)*R*T / P*2V = n(CO2)*R*T / P*V
Since P, R and T are contstant, we can simplify this to:
n(O2)/2 = n(CO2)
Step 3: Calculate moles of O2
Moles O2 = mass O2/ Molar mass O2
Moles O2 = 41.6 grams / 32 g/mol
Moles O2 = 1.3 mol O2
The number of moles CO2 = 0.65 mol
Mass of CO2 = Moles CO2 * Molar Mass CO2
Mass of CO2 = 0.65 mol * 44.01 g/mol
Mass of CO2 = 28.6 grams
The mass of carbon dioxide is 28.6 grams
mark me as brainliest because it took me hour to solve this pls
magnesium bromide is an ionic compound with the chemical formula mgbr₂.what does the "2" indicates?
Magnesium bromide is the inorganic compound with the formula Mgbr₂, where 2 indicates that there are 2 bromide ions for every magnesium.
Magnesium bromide (MgBr2) is an ionic compound of magnesium and bromine, that is, it is the compound that is formed when an atom with low electronic affinity gives up electrons, becoming an anion, while another atom gains those electrons.
It exists in different forms depending on the degree of hydration, the two main forms are anhydrous and hexahydrate.Therefore, we can conclude that magnesium bromide is a compound where for each magnesium ion there are 2 bromide ions.
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Blank blank and blank are examples of nonverbal communication.
Answer:
Maintaining eye contact, Using positive tone voice, and standing with a good posture.
Explanation:
Hope that helps.
Which of the following statements are true? check all of the boxes that apply.
Answer: can't see the boxes?
Explanation:
Answer:
A and C
Explanation:
Trust
Using the following quotation from the biography nolan bushnell.
Answer:
can you please post the picture for this thank you and
A banana is 8 inches long how many 0. 4 inch slices.
Question 2 fill in the blank: data-inspired decision-making can discover _____ when exploring different data sources.
Data-inspired decision-making can discover common information when exploring different data sources. It involves the exploration of different sources of data.
Decision-making refers to the process of making choices by recognizing the better decision.
Moreover, data-inspired expresses the best ways to generate ideas while exploring data.
Finally, data-inspired decision-making refers to the exploration of different sources of data to identify and recognize what they have in common.
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What is the most appropriate unit for the length of a pencil.
Answer:
inches
Explanation:
because centimeters is to small and inches is easier to count