Find the expected number of complaints per day

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

What is the sum of the first 8 terms of the geometric series

What is the range of the inverse of the given function f(x)=√x-2