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A woman invests a total of $20,000 in two accoutns, one paying 5% and the other paying 8% simple interest per year.  Her annual interest is $1180.  How much did she invest at each rate?...

Susie picked peaches for her elderly neighbor. In a 7-day period, she collected 182 peaches total. Each day she picked 6 more peaches than the day before. How many peaches did she pick the 1st day...

The treatment of a certain viral disease requires a combination dose of drugs D1 and D2. Each unit of D1 contains 1 milligram of factor X and 2 milligrams of factor Y, and each unit of D2 contains...

When I substitute u=x^2-5x+25 I get du=2x-5 dx. That gets me close to x dx. I would normally just pull out 1/2, but I'm confused how to deal with the -5.  it looks like I should get a ln...

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