9 class report card with marks

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

7+(3n++8) what is the answer to this?

Part 1: use the graph to count the slope of the line that passes through the points (2,1) and (2,0).part 2 in two or more complete sentences, explain why it is not possible to write the equation of the given line in the traditional version of the point-slope form of a line