Show work. check: -4n-8n+17=23 if n= -1/2

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

10% of 1,900,000. show me how you got the answer