If is valid : a ²- b ² = 117 and a - b = 3, then what is the value of the expression a + b ? A.31
B.33
C.36
D.39​

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b?