Answer:
B
Step-by-step explanation:
Remove unnecessary parenthesis
9.4x-3y-(4.5x-8y)
When there is a "-" in front of an expression in parentheses, change the sign of each term of the expression
9.4x-3y-4.5x+8y
Collect like terms
(9.4x-4.5x)-3y+8y
4.9x+5y
