What is the percent of increase from $23 to $38?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

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

Hi, can anyone show me how to do this problem? 100 points for this. in advance