Can -2 1/8 be multiplied with a rational number to illustrate the product of two rational numbers is rational

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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?

Solve the system of equations. 2x-2y=-4 and x+y=8. show work