Students are on a 248.5-kilometer bike trip. they rode 52.4 kilometers on the first day. they rode 0.4 of the remaining distance on the second day. how many kilometers do they have left to ride?

Answer! if you don’t mind, can you explain

8.74 rounded to the nearest whole number

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15