Can someone help me pls :(

Every time you drive you will experience a combination of driving conditions and environments.

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.

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x