P= (x, -6/7) lies on the unit circle. what is the value of x in simplest form

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

Prove that quadrilateral is a rhombus.

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?