Factor the following polynomial completely.
-x2 y2 + x4 +9y2 - 9x2
a. (x-3)(x - 3)(x + )(x-)
b. (x+3)(x+3)(x + 1)(x - 1)
c. (x + 3)(x - 3)(x + y)(x - y)

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6

Need plz been trying to do it for a long time and still haven’t succeeded

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?