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Which of the following is a pair of like terms?

Class 7Like and Unlike TermsAlgebra

A $3 x$ and $3 y$
B $5 a$ and $9 a$
C $2 x$ and $2 x^{2}$
D4m and $4 n$

Step-by-Step Solution

Like terms have the same variable raised to the same power.

5 a

and

9 a

both have the variable 'a' to the power 1, so they are like terms.

Answer: B)

5 a

and

9 a

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