A: calculate the length of ce b: calculate the length of de c: the area of a triangle abd is 36cm calculate the area of the quadrilateral bdec

correct answers below:

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply

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.