if I subtract 20 from my number, then square the result, I get the same answer as if I square my number, then subtract 20 from the result
What is my number and how do you work it out?

Answers

Answer 1

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 2

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


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which organ system removes carbon dioxide from the bloodstream?

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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.

Oil refining is an example of:

Construction Production
Extractive Production
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Traditional Production

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Answer:

i think its the first one

Explanation:

The answer would be extractive production.

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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:

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Answer:

the order in which it is preformed.. sorry if in wrong

The first step in sensation for some sensory systems is the __________, which modify incoming stimuli. Sensory receptors accessory structures absolute thresholds thermoreceptors.

Answers

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:

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The 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.

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Answer:

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Explanation:

What supplies energy used to synthesize carbohydrates during the Calvin cycle?

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The energy from light dependent reactions.

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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.

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I think the answer is photochemical smog.

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which statement best describes how enzymes function in the body?

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Answer:

Qual afirmação descreve melhor como as enzimas funcionam no corpo?

Explanation:

espero ter ajudado boa noite

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

Answers

Answer:

c

Explanation:

it's not really a chemical per se but c is close enuff

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Answers

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:

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(B) a 25 percent decrease in the populations of foxes, wolves, or other predators of arctic hares

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Answers

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

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Increasing their population by 425 individuals with the hares having a

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Trait approaches to leadership propose that leadership ability arises from distinctive personal characteristics. These personality traits shape personality.

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Answer:

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Explanation:

If you like my answer than please mark me brainliest thanks

The answer is: B - Autotrophs produce sugars.

Can someone plz help Me? :(

Answers

C is the right answer

Answer:

C

Explanation:

I think it's c, but I might be wrong

PLS HELP ILL GIVE BRAILYEST AND 100PTSPLS HELP ME
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Answers

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Explanation:

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Answers

Answer:

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Answer:

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Answer:

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Answer:

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Answer:

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I am just a teen who needs some help with homework. :)
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Answers

Answer:

Green eyes

Explanation:

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Only 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 eyes

They 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.

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