Multiply. write a the product as a mixed number

1. 3 × 2 1/2
2. 2 × 2 2/3
3. 5 × 1 2/4
4. 4 × 2 2/5

8 2/3 is the answer

step-by-step explanation: just use a calculator

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.