Collect like terms.
-$3.2 a+7.9 b-2.1 a-3.8 b$
A) $1.1 \mathrm{a}+4.1 \mathrm{~b}$
B) $1.1 \mathrm{a}+11.7 \mathrm{~b}$
C) $5.3 a+11.7 b$
D) $-1.1 \mathrm{a}+4.1 \mathrm{~b}$

Question

Quizplus · Accepted Answer

To collect like terms, add or subtract the coefficients of the same variables: $3.2a - 2.1a = 1.1a$ and $7.9b - 3.8b = 4.1b$, resulting in $1.1a + 4.1b$.

Collect Like Terms 3.2a+7.9b−2.1a−3.8b3.2 a+7.9 b-2.1 a-3.8 b3.2a+7.9b−2.1a−3.8b A) 1.1a+4.1 b1.1 \mathrm{a}+4.1 \mathrm{~b}1.1a+4.1 b

Collect Like Terms $3.2 a+7.9 b-2.1 a-3.8 b$ A) $1.1 \mathrm{a}+4.1 \mathrm{~b}$