Is this correct if not please help correct me

Convert 16 yards to feet use the conversion rate 3 feet = 1 yard

Don't know how to find x given these segment lengths

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