Answer
a. $2$
b. $5$
c. $0$
Work Step by Step
The degree of a monomial is the sum of the exponents of its variables.
The degree of a nonzero constant is 0.
Zero has no degree.
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a. The sum of the exponents of the variables is $1+1=2$.
$(x=x^{1})$
b. The sum of the exponents of the variables is $4+1=5$.
c. This is a nonzero constant. Degree=0.