Find angle that is marked by question mark​

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

Angel entered a triathlon (a three-part race). he swam 1 mile, rode his bike 30 miles, and ran 10 miles. how far did he go altogether? a. 11 miles b. 123 miles c. 41 miles d. 40 miles

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?