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

Multiple Choice

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) $8.8 a+10.9 b$