Can you guys pls help i’m so lost

Step-by-step explanation:

f(x) = sqrt(x-4)

Domain is x>= 4 because when x<4, then x-4 becomes negative, and square of negative numbers is not in the real domain.

f(10) = sqrt(10-4) = sqrt(6) = 2.45

f(6) = sqrt(6-4) = sqrt(2) = 1.41

f(12) =sqrt(12-4) = sqrt(8)   = 2.28

f(19) = sqrt(19-4) = sqrt(15) = 3.87

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^