What t2o numbers multiply together to equal -15 and add together equal -2?

The two numbers are -5, 3. Which are multiply together to equal -15 and add together equal -2.  

Step-by-step explanation:

Step:1

      Let, X,Y.

      Where X, Y are two numbers.

Step:2

      Form the Multiplication equation from given,

      X×Y=-15 (∵ Multiply to equal -15)

Step:3

     Form Addition equation from given,

      X+Y= -2 (∵ Add equal to -2)

Step:4

      Check for alternatives to satisfy both equations

      Assume, X=1, Y=-15

      -15+1 = -14 (Not Satisfy addition equation)

      1×(-15)= -15 (Satisfy multiplication equation)

      Assume, X=15, Y=-1

      -1+15= 14 (Not Satisfy addition equation)

      (-1)×15= -15 (Satisfy multiplication equation)

  similarly.,

      assume X=-5, Y=3

      -5+3= -2 (Satisfy addition equation)  

      (-5)×3= -15 (Satisfy multiplication equation)

      So, the two numbers are -5,3.

y=1/4x-4

step-by-step explanation:

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.