(Geometry) WILL GIVE BRAINY) 1) what is the value of x?

2) what is the value of x?

3)The number of triangles formed in a decagon when all of the diagonals from one vertex are drawn is___?

Find the slope of the line passing through a pair of points

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?