On a buying trip in los angeles rosario perez ordered 120 pieces of jewelry a number of bracelets at $8 each and a number of necklaces at $11 each. she wrote a check for $1080 to pay for the order. how many bracelets and how many necklaces did rosaria purchase?

Which of the following vectors are orthogonal to (2,1)? check all that apply

Measure a and b and find their sum. how are the angles related?

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)?