Answer:
-10y + 11.4
I hope this helps you out
-10y+11.4
Step-by-step explanation:
you combine -2y with -8y to get negative -10y. Then you combine 3 and 8.4 to get 11. Variables usually come first in equations, I don't think it matters, but you might want to put them first anyway.
take a picture and ill be able to help you
d=-18
b