2numbers have a difftence of 0.7 and a sum of 1. what are the numbers?

x = 0.85; y = 0.15

Step-by-step explanation:

Let the larger number = x

Let the smaller number = y

Equations

x + y = 1

x - y = 0.7    

Solution

Find x

Add the equations together.

x + x = 1 + 0.7    Combine like terms.  

2x = 1.7              Divide both sides by 2

2x/2 = 1.7/2

x = 0.85

Find y

x + y = 1         Substitute for x

0.85 + y = 1   Subtract 0.85 from both sides

0.85 - 0.85 + y = 1 - 0.85

y = 0.15

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13