Answers
Answer:
The equation for a circle with center (a, b) and radius r is:
(x - a)^2 + (y - b)^2 = r^2
Substituting the given values into this equation, we get:
(x - 8)^2 + (y - (-4))^2 = 9^2
Simplifying this equation, we get:
(x - 8)^2 + (y + 4)^2 = 81
Therefore, the equation that must be true for a point (x,y) to lie on the circle with center (8, -4) and radius 9 is:
(x - 8)^2 + (y + 4)^2 = 81
The equation that must be true is (x-8)² + (y+4)² = 81, which is the standard form equation of a circle with center (8,-4) and radius 9.
The equation of a circle with center (a,b) and radius r is given by:
(x-a)² + (y-b)² = r²In this problem, the center of the circle is (8,-4) and the radius is 9. Substituting these values into the equation, we get:
(x-8)² + (y+4)² = 9²Simplifying the equation, we get:
(x-8)² + (y+4)² = 81Therefore, the equation that must be true for a point (x,y) to lie on the circle with center (8,-4) and radius 9 is (x-8)² + (y+4)² = 81.
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Related Questions
Photosynthesis could not occur without which of the following?
Answers
Answer: I think it’s is sunlight I hope this is right
Explanation:
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.Plants use chlorophyll, usually found in their leaves, to absorb sunlight. The light energy from the sun is what fuels the reactions that transform carbon dioxide and water into glucose and oxygen. Without light, photosynthesis is impossible
Water
And carbon dioxide
Because photosynthesis is a process between water and carbon dioxide to produce oxygen and glucose
The opossum is a new arrival in southern Ontario. Its niche is similar to that of the raccoon. An opossum has a long, bare, rat-like tail. A raccoon has a long, bushy tail. How is this a selective advantage for the raccoon?
Answers
The long, bushy tail of the raccoon may be a selective advantage for this species because the bushy tail helps keep the face warm during a snowstorm (Option d). In addition, it may serve as camouflage and also may act to communicate with other members of the population.
What is an evolutionary selective advantage?An evolutionary selective advantage is a feature in a species that confer an advantage to survive and reproduce in a particular environmental condition, which may be associated such as in this case to the tail in raccoons.
Therefore, with this data, we can see that an evolutionary selective advantage is any phenotypic feature that enhances the survival and or reproductive rate of individuals in a population or species.
Complete question:
The opossum is a new arrival in southern Ontario. Its niche is similar to that of the raccoon. An opossum has a long, bare, rat-like tail. A raccoon has a long, bushy tail. How is this a selective advantage for the raccoon?
selective advantage only applies to populations
the opossum tail can grab onto a tree for balance
tail fur does not have an impact on survival
the bushy tail helps keep the face warm during a snowstorm
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what type of stream valley forms oxbow lakes ?
1. Youthful stream valley
2.mature stream valley
3. Old age stream valley
Answers
Answer:
I thik answer is 2 number
Describe how light energy is transformed into chemical energy during photosynthesis
Answers
Answer:
Light energy is converted to chemical energy when a photochemically excited special chlorophyll molecule of the photosynthetic reaction center loses an electron, undergoing an oxidation reaction.
Explanation:
LEMME GET THT BRAINLIEST PLZ
im confused, can someone help
Answers
Answer:
The stimulus is the temperature of the air. Sensory receptors in the skin send signals to the brain that the temperature is cold. Motor neurons stimulate muscle cells so that Dina can move to put on her coat.Explanation:
Thermoreceptors are free nerve endings that reside in the skin, liver, and skeletal muscles, and in the hypothalamusWhat is hypothalamusThe hypothalamus is an area of the brain that produces hormones that control: Body temperature. Heart rate. Hunger. it is a structure deep within your brain. It's the main link between your endocrine system and your nervous system.
What is the name of the process occurring along the inner membrane of mitochondria that pumps protons (H+) into the intermembrane space to drive synthesis of ATP?
A. anaerobic respiration
B. electron transport chain
C. krebs cycle
D. glycolysis
Answers
Answer: The electron transport chain is a series of electron transporters embedded in the inner mitochondrial membrane that shuttles electrons from NADH and FADH2 to molecular oxygen. In the process, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.
Explanation:
Answer:
B: Electron transport chain
Explanation:
I took the test and it said
Electrons are donated from one receptor to the next until they reach a proton pump that pumps protons into the intermembrane space and drives the synthesis of ATP.
what do you mean by we are responsible for more than what becomes of us we are also responsible for what becomes of others
Answers
Answer:
it's trying to say what u do doesn't only affect ur life but that of others
All living things have four basic needs to livea and function. List these four needs.
Answers
Answer:
Explanation:
Most living things need food, water, light, temperatures within certain limits, and air. Living things have a variety of characteristics that are displayed to different degrees: they respire, move, respond to stimuli, reproduce and grow, and are dependent on their environment.
Joaquim and Patrick want to save money on their energy bills. Which one of the following would NOT result in a reduction in energy costs?
Please choose the correct answer from the following choices, and then select the submit answer button.
Answer choices
switching all their compact fluorescent bulbs to incandescent bulbs
buying an Energy Star-rated clothes dryer
installing a tankless water heater
add insulation in the roof space
Answers
Switching all their compact fluorescent bulbs to incandescent bulbs would NOT result in a reduction in energy costs. Option a is correct.
Switching all compact fluorescent bulbs to incandescent bulbs would not result in a reduction in energy costs because incandescent bulbs are not energy-efficient. Compact fluorescent bulbs use 75% less energy than incandescent bulbs and last up to ten times longer, making them a much more cost-effective option. Buying an Energy Star-rated clothes dryer can also help save energy and reduce costs.
Energy Star appliances are designed to use less energy than standard appliances, which translates to lower energy bills over time. Installing a tankless water heater can also help reduce energy costs by only heating water when it is needed. Finally, adding insulation in the roof space can help keep a home warmer in the winter and cooler in the summer, reducing the need for heating and air conditioning, and thus reducing energy costs. Option a is correct.
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Sometimes patients with Dementia experience the inability to complete tasks.
Simple tasks such as getting dressed, brushing teeth, and eating become
overwhelming. This inability to perform familiar tasks is?
Forgetfulness
Agnosia
Apraxia
Delusions
Answers
Apraxia is the inability to carry out routine duties as they are explained in the context.
A neurological illness known as apraxia is characterised by the loss or impairment of the capacity to carry out or execute skilled or deliberate motions, even though the affected person is physically capable of doing so.
Apraxia in dementia patients might show itself as trouble with once-routine and familiar daily tasks like dressing, grooming, or eating. In contrast to other cognitive symptoms of dementia such as forgetfulness, agnosia (loss of sensory perception), and delusions, which are not explicitly connected to the inability to perform tasks, apraxia is separate from these symptoms.
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The universal blood donor is A) O+, B) A+, or C) AB-
Answers
O+
because lack antigen A,B, and AB
Unipolar neurons carry ____________ information from the PNS to the CNS
Answers
Answer: " sensory " .
______________________________________________
Explanation:
Unipolar neurons known as "motor neurons" [or "afferent neurons"] carry sensory information from {tissues and organs in the PNS
["peripheral nervous system"] to the CNS ["central nervous system".].
______________________________________________
What is accretion?
PLEASE HELPPPPP!!!
Answers
Answer:
b is the answer accretion means to add or to increase
Answer:
its b
Explanation:
i have the same test
The Krebs cycle produces ________, ________, and carbon dioxide.
Question options:
A)
electron carriers, oxygen
B)
pyruvate, ATP
C)
ATP, electron carriers
D)
oxygen, ATP
E)
glucose, oxygen
Answers
Answer:
This produces 2 ATP and 6 NADH
Which of the following path correctly displays the transfer of energy of for sound
Answers
Answer:
energy sources to medium to detection
Explanation:
Which of the following is the most like the Biblical concept of grace:
O A. a wage: something earned
B. a benefit, blessing, standing, or position given without being earned or deserved
OC a reward; something achieved
O D. a woman's name
Answers
Answer: B
Explanation:
Grace is the term Christians use to describe God's unconditional love for everyone, whether or not they have behaved as he wants them to. Because God's love is thought to bring redemption , some Christians believe that salvation does not need to be earned through good works.
How does adenosine triphosphate (ATP) become adenosine diphosphate (ADP)?
ATP stores energy as a phosphate bond is formed.
ATP releases energy as a phosphate bond is formed.
ATP releases energy as a phosphate bond is broken.
ATP stores energy as a phosphate bond is broken.
Answers
The correct answer is ATP releases energy as a phosphate bond is broken.
ATP (adenosine triphosphate) is converted into ADP (adenosine diphosphate) when a phosphate group is removed from ATP, resulting in the release of energy. This process is known as hydrolysis, where water molecules are used to break the bond between the terminal phosphate group and the rest of the molecule.
During cellular metabolism, ATP serves as the primary energy currency of the cell. When energy is required for various cellular processes, the phosphate bond in ATP is broken by an enzyme called ATPase. This enzymatic hydrolysis reaction cleaves off one of the phosphate groups, resulting in the formation of ADP and an inorganic phosphate molecule (Pi). The released phosphate group is then available to be used in other cellular reactions.
The conversion of ATP to ADP is an essential part of energy metabolism in cells. The energy released during this process is utilized to drive various cellular activities, such as muscle contraction, active transport of molecules across cell membranes, and synthesis of macromolecules. Once ATP is converted to ADP, it can be further hydrolyzed to AMP (adenosine monophosphate) if more energy is needed. Ultimately, the energy stored in ATP is released when the phosphate bond is broken, allowing cells to perform their vital functions.
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I need help on This question This is My homework
Answers
The potential sources of error can be eliminated by testing a fourth group in which participants do not get the dosage. The correct option is A.
Scientists can establish if the reported effects are indeed caused by the mineral supplement or whether they are the consequence of other variables by comparing the results of this group with those of the three groups receiving various dosages.
If the fourth group, which did not get the dosage, has the same outcomes as the other groups, it implies that the observed benefits may not be attributable to the drug but rather to other elements such as placebo effects, natural healing, or changes in the instances of the common cold itself. This extra control group contributes to the precision and dependability of the study's conclusions.
Thus, the ideal selection is option A.
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Minimum of 4 sentencesExplain if it is correct or incorrect: "Plants have chloroplast and animals have mitochondria.:
Answers
It is partially correct, as chloroplasts are the organelles responsible of photosyntesis, which allow plants to produce their own food as plants are autotrophic organisms. To sum up, chloroplasts are only present in plants.
On the other side, mitochondrias are both present on animals and in plants too, as this organelle is where the cell respiration takes place, necessary process for obtaining energy in the form of ATP, molecule used in all living organisms.
What product has wheat flour as its substrate and yeast as the microbe? *
Answers
Answer:5
Explanation:
Wheat flour contains starch. The starch is hydrolysed to glucose. Glucose is used by yeast(saccharomyces cerevisae) to make ethanol.
C6H12O6(glucose from wheat flour)---(yeast)-->2C2H5O(ethanol)+2CO2
Ethanol is the main product
why do proteins not pass through plasma membranes
Answers
Answer:
because protein molecules are very large in molar masses
What is an example of a SCIENTIFIC observation?
-most people drive red cars
- The rock is smooth and gray
- what is the best brand of soap?
Answers
Answer:
The rock is smooth and gray
Explanation:
The water cycle occurs almost exclusively in which layer of our atmosphere?
Answers
Answer:
Trophosphere
Explanation: Im smart
Answer:
Earth's water continuously moves through the atmosphere, into and out of the oceans, ... rivers, streams) provides nearly 90% of the moisture in our atmosphere. ... Even the wettest regions would form a layer of water only 60 ...
Explanation:
Question 2 of 10
Which best describes the ecosystems on Earth?
A. There are very few types of ecosystems on Earth.
B. Earth has mostly rain forest ecosystems.
C. Ecosystems do not interact with each other.
O D. Separate ecosystems can affect each other.
Answers
Answer:
D. Separate ecosystems can affect each other.
I think the Answer is C.
Explanation:
The answer is C because if you think about it a desert does not affect the rainforest, or vise versa.
Pikas grow thick fur in winter, and their small bodies conserve heat. Kangaroo rats
do not sweat, and oily fur helps them conserve moisture. They get water from seeds.
Predict what would happen if a pika and a kangaroo rat switched environments.
Answers
A pika's adaptation to its habitat includes growing thick fur in winter to conserve heat. In contrast, the desert environment where the kangaroo rat lives is very hot and dry; therefore, its oily fur helps to conserve moisture rather than heat. The pika's thick fur would make it too hot in the desert environment, whereas the kangaroo rat's oily fur would not be sufficient to conserve moisture in the colder environment.
Additionally, pikas get their water from consuming snow whereas kangaroo rats get water from seeds. In a colder environment, snow is readily available, but in the desert, there is no snow. The kangaroo rats might not be able to survive in colder environments if they do not have access to water, and the pika might not be able to survive in the desert without access to snow.
Therefore, it is likely that the adaptations that allowed the pika and the kangaroo rat to survive in their respective environments would make it difficult for them to survive if they were to switch habitats.
what is the resting phase of the cell cycle called?
A. Prometaphase
B. Mitosis
C. Interphase
Answers
The resting phase of the cell cycle is called interphase.
Interphase is a critical stage in the cell cycle during which the cell prepares for division by going through different activities such as growth, DNA replication, and protein and organelle production. It is the longest phase of the cell cycle and is separated into three subphases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
The cell develops in size, synthesises RNA and proteins, and performs its regular duties during the G1 phase. The cell enters the S phase after passing through the G1 checkpoint. The DNA of the cell is reproduced during the S phase, resulting in the production of two identical copies of each chromosome.
This ensures that during cell division, each daughter cell receives a complete set of genetic material. The cell enters the G2 phase after DNA replication, where it continues to expand and prepares for mitosis.
Interphase is not a real resting phase because the cell is actively engaged in multiple cellular functions. However, because the cell is not visibly dividing at this period, it is commonly referred to as the resting phase.
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What is the main function of nutrients? A.helps maintain body temperature
B. keep out unwanted microorganism. C. aids in the growth and development D. helps breakdown fats
Answers
Answer:
Option C
Explanation:
Hope this helps. Cheers!
A substance with a pH of 3 is how many more times acidic than a substance with a pH of 5?
Answers
Which of the following represents an in vivo method for cultivating viruses.
a.) HeLa cells
b.) Pure bacterial cell cultures
c.) Embryonated chicken eggs
d.) Lung cell culture
Answers
Embryonated chicken eggs represents an in vivo method for cultivating viruses. (option c)
To cultivate viruses in a living system, an in vivo method is used. Among the options provided, embryonated chicken eggs are the most commonly used method for culturing viruses in a living organism.
HeLa cells: HeLa cells (a) are human cancer cells commonly used in laboratory research, but they are not a living organism suitable for virus cultivation.
Pure bacterial cell cultures: Bacterial cell cultures (b) are often used to study bacteriophages, which are viruses that infect bacteria. However, this method involves culturing viruses in bacterial hosts and does not involve a living organism.
Embryonated chicken eggs: Embryonated chicken eggs (c) are a widely used method for virus cultivation. In this method, viruses are injected into the developing embryo, which provides an environment for viral replication. The embryos provide a controlled and nutrient-rich environment for the viruses to grow and propagate.
Lung cell culture: Lung cell culture (d) involves growing lung cells in a laboratory setting. While this method can be used to study certain viruses, it is an in vitro (outside a living organism) method rather than an in vivo method.
In conclusion, the in vivo method for cultivating viruses among the options provided is embryonated chicken eggs. This method provides a living system in which viruses can replicate and propagate. (option c)
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PLEASE HELPPP!!!!
A water sample from a lake ecosystem was analyzed for dissolved oxygen content. The results are summarized in the table below.
1.) Calculate the net productivity. (1 point)
2.) Calculate the gross productivity. (1 point)
3.) Calculate the loss of oxygen due to respiration. (1 point)
4.) Calculate the net amount of carbon fixed by the lake sample in mg C/L. (1 point) mg 0₂/L
Ã-0.698 = mL 0₂/L mL 0₂/L Ã-0.536 = mg carbon fixed/L
Answers
The net productivity of dissolved oxygen can be calculated by substrating the initial amount of DO from the amount under light conditions.
Net productivity can be calculated as
DO after incubation in light - Initial DO
10.30-7.20 = 3.1 mL O2/L
Gross productivity is the total rate of photosynthesis including the organic matter used up in respiration during the measurement period. It can be calculated as:
GPP = Net productivity + Respiratory activity
Respiratory activity is calculated as the initial DO- DO after incubation in the dark.
therefore, the respiratory activity is 7.20 - 4.10= 3.1
GPP = 3.1 +3.1= 6.2 mL O2/L
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