Mary and her brother john collect foreign coins. mary has twice the number of coins that john has. together they have 105 foreign coins. find how many coins mary has.

If square root x = -7, then x= -49 true or false

What are the exclude value of mn+3m

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142