Where would an imaginary line need to be drawn to reflect across an axis of symmetry so that a regular pentagon can carry onto itself?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

We just started the introduction into circles and i have no idea how to do this.

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove