Sabah has $450 to pay for college textbooks. she expects to pay about $75 per book. her friend told her that 4 of them can be checked out of the library for free. complete the equation below to find the total number of books that sabah can get for her classes. use b to represent the total books.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?