What number decreased by 23% is equals 123?

Mathematics

1 answer:

vredina [299]3 years ago

7 0

Answer: Lets call the number x

decreased means subtraction. If x is decreased bt 23% then the result is

x-23%(x) = x-(23/100)x or x-.23x

x-.23x=539

.77x=539

x=539/.77

x=700

check: 700-.23(700)=539

700-161=539

539=539

Our answer is correct

Step-by-step explanation:

hope this helps❤️❤️❤️

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noname [10]

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$8.51x10^{-3}cm$

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In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent. In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3. In order to add them, we can move the decimal over for the body cell diameter:

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