Which expression is equivalent to this expression? 4a + (–6b) – 3a + 2b A. a + 4b B. a – 4b C. 7a – 8b D. 7a – 4b Please Help! :(

b. a-4b

Step-by-step explanation:

4a-3a=a

(-6b)+2b=-4b

combine these two and you get a-4b

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.