Evaluate -3a - 2b for a = -4 and b = -3

The solution set for 5v2 – 125 = 0 is

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

An internet company charges $8.95 per month for the first 3 months that it hosts your web site. then the company charges $11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?