Find the value of c such that the expression is a perfect-square trinomial.

x^2+22x+c

Which expression is equal to (21)(7)(3x) using the associative property? (21 · 7 · 3)x (7)(21)(3x) 32(7 + 3x) (3x)(7)(21)

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?