if demand is 40000 units a year and it costs $20 to place an order and 40 to hold a unit. find the order size

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

What signals you that factoring by grouping is the best method to use when factoring a problem?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15