3.4-2.8d+2.8d-1.3 combine like terms to create an equivalent expression

When you combine the like terms your answer will be 2.1

the answer is: 5.6d+2.1

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!