What is the standard deviation of 73, 14, 21, 45, 18, 74, 32, 37

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

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?