Collect like terms.
-$6.7 \mathrm{a}+9.2 \mathrm{~b}-2.1 \mathrm{a}-1.7 \mathrm{~b}$
A) $-4.6 a+7.5 b$
B) $4.6 \mathrm{a}+10.9 \mathrm{~b}$
C) $4.6 \mathrm{a}+7.5 \mathrm{~b}$
D) $8.8 a+10.9 b$

Question

Quizplus · Accepted Answer

To collect like terms, add or subtract the coefficients (numbers in front) of the same variable. For $a$, $6.7 - 2.1 = 4.6$. For $b$, $9.2 - 1.7 = 7.5$. Thus, the correct expression is $4.6a + 7.5b$.

Collect Like Terms 6.7a+9.2 b−2.1a−1.7 b6.7 \mathrm{a}+9.2 \mathrm{~b}-2.1 \mathrm{a}-1.7 \mathrm{~b}6.7a+9.2 b−2.1a−1.7 b A) −4.6a+7.5b-4.6 a+7.5 b−4.6a+7.5b

Collect Like Terms $6.7 \mathrm{a}+9.2 \mathrm{~b}-2.1 \mathrm{a}-1.7 \mathrm{~b}$ A) $-4.6 a+7.5 b$