Candace and Dino run computer repair services. For a service call, Dino charges $50, while Candace charges $40. In addition, they each charge an hourly rate. Dino
charges $30/h and Candace charges $35/h. One day, their charges for two service
calls were the same. What did they charge and how long did each work? Show your
full solution for full marks.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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)?

What is the scale factor of axyz to auvw?