Which of the following expressions represents the distance between 1.71.71, point, 7 and -\dfrac{1}{2}− 2
1

minus, start fraction, 1, divided by, 2, end fraction on a number line?
Choose 1

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

i wish i could you, i have no idea how to answer this

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.