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The terms $8 mn$ and $5 mn$ are like terms. What is $8 mn + 5 mn$ ?

Class 7Like and Unlike TermsAlgebra

A $13 mn$
B $13 m^{2} n^{2}$
C $40 mn$
D $13 m + 13 n$

Step-by-Step Solution

Since

8 mn

and

5 mn

are like terms, add the coefficients: 8 + 5 = 13, keeping

mn

. So

8 mn + 5 mn = 13 mn

.

Answer: A)

13 mn

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