a ball of mass 5.0kg hits a smooth vertical wall normally with a speed of 2m/s and respond with the same speed. determine the impulse experienced by the ball. ​

(-5,-28)

i graphed to on desmos.

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.