simplify the expression 21d + 5f - 11d + 8 - 5
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A 10d + 5f + 3
B 33d + 5f + 13
C 15df + 3
D 21d - 6f - 3
To simplify the expression 21d + 5f - 11d + 8 - 5, we can combine like terms.
The like terms are the terms with the same variable(s) raised to the same exponent(s). In this expression, we have 21d and -11d which are like terms, and we also have 8 and -5, which are like terms as well.
Adding the coefficients of 21d and -11d gives us 21d - 11d = 10d.
Adding the coefficients of 8 and -5 gives us 8 - 5 = 3.
Therefore, the simplified expression is 10d + 5f + 3.
So, the answer is A) 10d + 5f + 3.