Ineed on finding the area of triangles. as you know, the formula for triangles is a=1/2bh. i'm not sure if my answers are correct. !

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36