If y-value decreases each time the x-value increses by 1, what is the slope of the line?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

See attachment below and find the equivalent of tan(∠qsr)

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?