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
<em>expand the equation;</em>
x² - 40x + 400 = x² - 20
<em>collect similar terms together;</em>
x² - x² - 40x = -20 - 400
-40x = -420
Thus, the value of the unknown number is 10.5.
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The expression or appearance of a particular trait is known as an organism's phenotype
The term "phenotype" describes an organism's observable physical characteristics, such as its appearance, growth, and behavior. The genotype, or collection of genes that an organism possesses, as well as environmental impacts on these genes, together determine its phenotype.
Earwax type, height, blood type, eye color, freckles, and hair color are phenotypic examples in humans. A phenotype is more than just a physical characteristic. A phenotype may also include a person's behavior. The dog breed known as the Border Collie, which was developed to herd sheep, serves as an illustration of inherited behavior.
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