1345667-123445=?answer first

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Sum of the interior angles of a pentagon

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