Me ! i need someone really (i have asked this question twice and people keep getting it wrong so i included the picture)

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

An octagonal prism has jow many lateral faces?

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