Plz answer this correctly plz

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.

I’m not good at math can i have ? ?

Simplify the expression below -3(10x+4y)+6(6x-2y)