Final answer:
When b = 5 and y = 4, the expression -b + 6y evaluates to 19. When b = 5 and y = -4, the expression -b + 6y evaluates to -29.
Step-by-step explanation:
To evaluate the expression -b + 6y when b = 5 and y = 4, substitute the given values into the expression and simplify:
-b + 6y = -(5) + 6(4) = -5 + 24 = 19
To evaluate the expression -b + 6y when b = 5 and y = -4, substitute the given values into the expression and simplify:
-b + 6y = -(5) + 6(-4) = -5 - 24 = -29