Joy is training for a triathlon. she runs a distance of 2x miles, cycles a distance of (x2 + 7) miles, and swims a distance of (x - 2) miles. which simplified expression is equivalent to the total distance, in miles, joy covers?
x2 + 3x + 5
x2 + 3x + 9
3x2 + 5
3x2 + 9

In order to get the simplified expression that is equivalent to the total distance, in miles, Joy covers, we just have to add the given expressions:
x2       + 7
     2x   
      x   -2

x2 + 3x + 5
Add the values with the same units.
Now the final answer would be x2 + 3x + 5. The answer is option A.
Hope this answer helps.