How to convert degrees minutes seconds to decimal degrees by hand?

The rectangle on the right is the image of the rectangle on the left. what transformation would result in this image? reflection rotation translation dilation

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.