Replace all the variables with their values. In this case, we know the value of the variable p.
Now the expressions p + 5 becomes 2 + 5.
2 + 5 = 7
So, C. 7 is the answer.
(I'll do my best to explain this:) ) if you put two triangles together they equal a rectangle. In other words if you split a rectangle from upper left corner to lower right corner you get two triangles. So if you multiply the triangle formula twice you get the rectangle formula.
5.308 would be the correct answer

Solve it and you get 1/8 easy.