Calculate the following sums. 20 ∑ (-2i+3) i=1

Find the sum of the series. 100 (Greek letter sigma) 3i i=1

Find the sum of the series. 100 (Greek letter sigma) i i=1

Sam and Bob both repair machines. Sam can repair one machine 5 hours faster than Bob can repair the same machine. If[..]

I start with a number and subtract 2 from it. Then I take 300% of the result and get back the number I started with.[..]

Find two numbers whose greatest common factor is 15 and least common multiple is 315, such that neither of them is[..]

the population density of a certain animal has been found to be decaying over several years. The population can be[..]

Find the amount of money accumulated if you invested $25,000 at 4.3% interest for 8 years compounded continuously.

30 basketballs (15 Spalding, 10 Wilson, and 5 other brand-name balls) are on a basketball court. Barry Wood closes[..]

Seattle Greenery In July in Seattle, the grass grows 1/2 in. a day on a sunny day and 1/4in. a day on a cloudy day.[..]