Originally Posted by

**NeoNeo**
Hi Abe21599,

Glad you asked! Here goes...

I used to get straight A's in algebra in high school and still use some of the basics but this problem eludes me. I need to find out how many mg. of product has been used to date? The amount increased per day remains constant at 2.14 mg. I know the numbers don't matter but this is what I'm dealing with:

day 1 2.14 mg.

day 2 4.28 mg.

day 3 6.42 mg.

day 3 8.56 mg.

etc.

For example, how much product (a powdered medicine, in this case) has been used by day 30? I have a constant (2.14 mg/day) and a variable (in this case, 30). Using simple addition, I can "inch" my way up to day 30 or if I knew the amount for day 29, I could simply add the constant (2.14) to it. But there's gotta be some type of equation that simply provides the accumulated total. Whaddaya think, Abe21599?

Paul