How to solve 3x+y=-14;-2x-y=9

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary