Ervin scores half as many points in a game as larry if larry scored x points write an expression to represent how many points ervin points

With math question will mark brainliest question in the pic.

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

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?