Fiona wrote the linear equation y = 2/5 x -5. when henry wrote his equation they discovered that his equation had all the same solutions as fionas. which equation could have been henry's.
a. x- 5/4y =25/4
b. x-5/2y=25/4
c. x-5/4y =25/4
d. x- 5/2y=25/2

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)?