Help anyone please almost done

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

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2