Question 9 How many milliliters of water should be evaporated from a
10 milliliters mixture that is 50% salt in order to be left
with one that is 80% salt?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?

7x^2-9x+5=0 find the discriminant and number of real solutions