Ithink it's a-b squared. am i right? how would i type that in the answer box? would i just type in the word minus or just "-"

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?