What is the common difference in the sequence 50 40 30 20 10

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.

Which graph corresponds to the function f(x) = x2 + 4x – 1?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation