Question

Which algebraic expression represents 10 less than a number?

A. n + 10
B. 10 – n
C. n – 10
D. 10n

Answer 1

Answer: C) n - 10

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Step-by-step explanation:

Consider an example of saying "10 less than 50" would mean we compute 50-10 = 40

Another example would be "10 less than 78" so we say 78-10 = 68

In general, we would use algebra to go from "10 less than a number" to "a number - 10" to n - 10

Whatever n is, we subtract 10 from it to get that expression.

From there, we replace n with various numbers. Eg: replace n with 50

n-10 = 50-10 = 40

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Be careful not to mix up "10 less than a number" with "10 is less than a number". The "is" being the difference. This single word will change what the symbol interpretation will be.

"10 is less than a number" translates to 10 < n

Answer 2

C

Step-by-step explanation:

It means a no minus 10. I hope this helps. Good luck