I need help, for this you need to simplify all the expressions and put them in the box, than find a matching pair and put them together but I am confused on the questions

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.

1) letter c.

2) 4 square root of 9

hope this

step-by-step explanation: