write down a 2 by 2 matrix a and 2 vector b such that ax=b has no solution. explain in a sentence why there are no solutions

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.

y=-2x+1500

step-by-step explanation:

+1500

2 over one