Which equation has an undefined slope?

a) y = 6x + 0

b) x = 4

c) y = -4

d) y = -2/3x - 6

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Evaluate the expression. (9 + 5)(3 + 2)0

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