Who knows stuff about probability

3x + 4y = 5 x- 3y = -7 solve by substitution

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

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