What does 1 + 1 equal

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

Explain how you can use the associative property to evaluate (7x50)x4.

Solve the triangle. a = 21°, c = 105°, c = 5