If we double the sum of the numbers x and -21, we get the number -100. What is x?

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? will mark the

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Which of the following is not a subset of {1,2,3}?