The value of the unknown number is 10.5.
Let the unknown number = x
When 20 is subtracted from the number and the result is squared which is equal to the square of the unknown number minus 20:
(x - 20)² = x² - 20
expand the equation;
x² - 40x + 400 = x² - 20
collect similar terms together;
x² - x² - 40x = -20 - 400
-40x = -420
[tex]x = \frac{420}{40}\\\\ x = 10.5[/tex]
Thus, the value of the unknown number is 10.5.
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Answer:
(x - 20)² = x² - 20
expand the equation;
x² - 40x + 400 = x² - 20
collect similar terms together;
x² - x² - 40x = -20 - 400
-40x = -420
PLS HELP ILL GIVE BRAILYEST AND 100PTSPLS HELP ME
Select the correct location on the image.
Where is the protective covering of the axon?
Answer: myelin sheath
Explanation:
The axon is covered by a myelin sheath. The axon passes information to the next neuron or other cell in the body. A myelin sheath.
atp comes from which biochemical system in the muscle?
Answer:
Phosphagen system. Glycogen-lactic acid system. Aerobic respiration.
Explanation:
What factors could decrease the rate of photosynthesis in a plant?
Answer: light intensity, carbon dioxide concentration and temperature i think- maybe
Explanation:
Without enough light, a plant cannot photosynthesise very quickly, even if there is plenty of water and carbon dioxide, Increasing the light intensity will boost the rate of photosynthesis and for carbon dioxide even if there is plenty of light, the plant cant photosynthesise if there is insufficient carbon dioxide. and why temperature is because if it gets too cold the rate of photosynthesis will decrease, Plants cant photosynthesise if it gets too hot either
how are plant and animal cells similar in structure
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.
how long can prime rib stay in fridge before cooking
While it's best the next day, leftover prime rib is good for between five and seven days in the fridge or up to six months in the freezer.
when a stem cell differentiates and changes in size and shape
which organ system removes carbon dioxide from the bloodstream?
Your respiratory system is the network of organs and tissues that help you breathe. This system helps your body absorb oxygen from the air so your organs can work. It also cleans waste gases, such as carbon dioxide, from your blood.
how do an enzyme and substrate to one another? what is the lock and key model of enzyme function?
Which correctly matches the strand of DNA with his complementary strand of RNA
Answer:
I think it's C. hope that helps
What happens during photosynthesis?
a. Autotrophs consume sugars
b. Autotrophs produce sugars
c. Heterotrophs produce ATP.
d. Heterotrophs consume ATP.
Answer:
Answer is option a. Autotrophs consume sugars
Explanation:
If you like my answer than please mark me brainliest thanks
thylacosmilus is a marsupial and smilodon is a mammal
Answer:
whats the question?
trait approaches to leadership propose that leadership ability arises from:
Trait approaches to leadership propose that leadership ability arises from distinctive personal characteristics. These personality traits shape personality.
Personality refers to the singular and unique patterns of thoughts, emotions and behaviors that exhibit a person.
The trait approaches represent different methodologies to analyze the personality of a person (for example, his/her leadership skills).
These approaches (trait approaches) put major emphasis on the traits of a person that can be considered markers of personality.
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Help please help, anybody please
What is the role of transport proteins in the cell membrane
Explanation:
Membrane transport proteins fulfill an essential function in every living cell by catalyzing the translocation of solutes, including ions, neurotransmitters, and numerous drugs across biological membranes
A thick, brownish haze that forms when gases in the air react with sunlight
This image shows the offspring that result from a dihybrid cross between a plant with wrinkled green seeds and a plant with round yellow seeds.
The fact that the seeds can be one of two different colors shows that the chromosomes with the seed color gene must sort independently.
The fact that the seeds can be one of two different colors shows that the chromosomes with the seed color gene must sort independently.
The fact that the seeds can be one of two different textures shows that the chromosomes with the seed texture gene must sort independently.
The fact that the seeds can be one of two different textures shows that the chromosomes with the seed texture gene must sort independently.
The idea that alleles sort independently is supported by the fact that some second generation offspring have trait combinations that the first generation parents do not have.
The idea that alleles sort independently is supported by the fact that some second generation offspring have trait combinations that the first generation parents do not have.
The idea that alleles sort independently is supported by the fact that some second generation offspring have the same trait combinations that the first generation parents have.
How can this graphic be used to support the idea of independent assortment?
Answer:
The idea that alleles sort independently is supported by the fact that some second generation offspring have trait combinations that the first generation parents do not have.
which statement best describes how enzymes function in the body?
Answer:
Qual afirmação descreve melhor como as enzimas funcionam no corpo?
Explanation:
espero ter ajudado boa noite
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I am just a teen who needs some help with homework. :)
This is my question:
What is the rarest eye colour in the world? Please help, it's due today.
Answer:
Green eyes
Explanation:
The production of melanin in the iris is what influences eye color. More melanin produces a darker coloring, while less makes for lighter eyes. Green eyes are the rarest, but there exist anecdotal reports that gray eyes are even rarer.
The rarest eye color in the world is green, only 2% of the population in the world have green eyes. To find out more about the list.....
1. Green eyesOnly 2% of people in the world are believed to have this eye color. It is most easily found in northern and Southern Europe and Western Asia.
2. Amber eyesThey are reddish-brown, with a golden and coppery undertone. Among the clear and beautiful eyes in the world, and according to the survey, the most iris, all eyes and beautiful in the world are according to the study, all eyes are rare and specific.
3. Red or violet eyeIt is generated by the body thanks to some genetic changes. The most common is albinism, a disease that lowers melanin levels. Because of this, the hair and eyes can be distinguished.
With this information, we can conclude that there are several eye colors, but the most rare is the color green.
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Can someone plz help Me? :(
Answer:
C
Explanation:
I think it's c, but I might be wrong
5. In a tundra ecosystem, the carrying capacity for arctic hares is about 400 individuals. Which of these events is MOST likely to reduce the carrying capacity for arctic hares in the ecosystem by at least 25 percent?
(A) a severe storm that kills about 100 adult and young arctic hares
(B) a 25 percent decrease in the populations of foxes, wolves, or other predators of arctic hares
(C) the arrival in the ecosystem of a species that competes with the arctic hare for its food
(D) a temporary increase in the arctic hare population to more than 425 individuals
(E) a mutation that introduces a new fur color to the arctic hare population
A temporary increase in the arctic hare population to more than 425
individuals.
Hares are among the primary consumers as they are herbivores while foxes
are secondary consumers which feeds on the hares.Foxes will hunt the
hares for food which will drastically reduce their population
Increasing their population by 425 individuals with the hares having a
population of 400 will surely decrease their carrying capacity in the tundra
ecosystem.
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what is the powerhouse of the cell?
Answer:
Mitochondria are responsible for respiration
Answer:
I believe it's mitochondria
The first step in sensation for some sensory systems is the __________, which modify incoming stimuli. Sensory receptors accessory structures absolute thresholds thermoreceptors.
During sensation, the first step for some sensory systems is the accessory structures, which are saddled with the responsibility of modifying an incoming stimuli.
A sensory system refers to components of the central nervous system (CNS) which comprises of the brain, neural tissues (pathways) and sensory neurons that are responsible for sensory functions, perception and processing of sensory information such as light, sound, heat, etc.
Basically, the five (5) main sense organs in the sensory system include the following:
SkinTongueEarsNoseEyesThe accessory structures is typically the first step the first step for some sensory systems because they are saddled with the responsibility of modifying an incoming stimuli.
Read more on accessory structures here: https://brainly.com/question/21151620
Answer:
Accessory Structures.
Explanation:
If you placed the celery into a bottle of colored water that was 35% sugar, would the colored water be seen in the celery? Why or why not?
Answer:
yes,The small "vessels" in the celery stalks carry the water and color to the leaves, like the way blood travels through your body.
Explanation:
when a cell is in anaphase what happens to the dna?
Answer:
During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle.Explanation:
En la naturaleza existen más de 4000 minerales diferentes conocidos conocidos
La declaración 'en la naturaleza existen más de 4000 minerales diferentes conocidos' es VERDADERA. Estos elementos pueden ser diferenciados por sus propiedades.
Un mineral es un material inorgánico que se encuentra en la naturaleza, el cual posee una estructura atómica específica, como así también una composición particular.
El estudio de la propiedades físicas y químicas permiten diferenciar los diferetes tipos de minerales que se encuentran en la naturaleza.
Los minerales pueden encontrarse en su estado puro (por ejemplo, oro, plata, cobre) o bien estar combinados con otros materiales para formar diferentes elementos.
Por ejemplo, el cuarzo está formado por la unión del silicio con oxígeno.
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what are the final products of catabolic reactions?
This model of the cell cycle includes two arrows that each represent a process in the cycle.
What do the two arrows represent?
Answer:
the order in which it is preformed.. sorry if in wrong
What supplies energy used to synthesize carbohydrates during the Calvin cycle?
24. What energy transformation occurs
during the combustion of coal in a
power plant?
A Electromagnetic energy is
transformed to thermal energy.
B Nuclear energy is transformed to
electromagnetic energy.
C Chemical energy is transformed to
thermal energy
D Chemical energy is transformed to
noclear energy
Answer:
c
Explanation:
it's not really a chemical per se but c is close enuff
Oil refining is an example of:
Construction Production
Extractive Production
Domestic Production
Traditional Production
Answer:
i think its the first one
Explanation: