Help please timed math test

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811