2x - y + z = 15
-6x - y - z= -11
4x - 3y - z= 0

Is a currency whose value is tied to another currency, meaning that the exchange is fixed

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.

Δabc is reflected across line l to form δ alblcl, and a¯¯¯al¯¯¯¯ intersects line l at point d. which equation is not necessarily true?