This question is very important I will give Brainliest for the correct answer!! It's just perimeter but I'm a little confused.

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

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.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)