If the figure is a regular polygon, solve for x.
(7x + 31).
x=

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

The elmina wilson company produces spaghetti sauce that is used in restaurants. the fixed costs total $1,329,050. the selling price per 64 oz. can of sauce is $12.40. the variable cost per can is $4.80. what is the break-even point in number of cans?

Which of these figures must be a rectangle?