Katie has x pets. Agatha has twice as many pets as Katie. Isabel has 3 more pets than Katie. Write an expression in terms of x for the number of pets Agatha has. Write an expression in terms of x for the total number of pets that Katie, agatha and isabel have.

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?