Answer:
i don't understand anything what grade are you in
Step-by-step explanation:
7-21
if -a+b
is thesame according to laws of integers as
b-a
2.5
3 1/2 - 9 3/4 =
3 2/4 - 9 3/4 = -6 1/4
-6 1/4 = -6.25 ÷ (-2.5) = 2.5
29
because 32-+3=29