Answer:
-7/5
Step-by-step explanation:
 
        
             
        
        
        
Given:
Choose a number between 0 and 20.
If the difference is less than 10 then Eric wins.
Let us x is Eric's number.  0 <u><</u> x <u><</u> 20
If Eric wins. |x -7| < 10
|x-7| < 10 → -10 < x-7 < 10 → -10 + 7 < x - 7 + 7 < 10 + 7 → -3 < x < 17
Taking into account that the number must be given between 0 and 20.
0 <u><</u> x <u><</u> 20
-3 < x < 17
→ 0 < x < 16
        
                    
             
        
        
        
Answer:
-1 to the nearest whole number.
Step-by-step explanation:
(-0.3) ÷ (-0.2)+(-2.56)
Order of operations - the division is done first:
= 1.5 = (-2.56)
= 1.5 - 2.56
= -1.06.
 
        
             
        
        
        
Answer: 
The result for this equation is  .
 .
Step-by-step explanation:
-Solve:

-Multiply  and
 and  by
 by  :
 :

-Reduce  to the lowest term by extracting and canceling out 3:
 to the lowest term by extracting and canceling out 3:

-So, the result is  .
 .
 
        
             
        
        
        
Theres a saying: Dividing fractions dont ask why, just flip the second and multiply. 
so a/b / c/d = a/b * d/c 
-8/2 * -3/6
1. cross - cancel common factor 2
4/2 * -3/3
2. Multiply
-4(-3)/ 2*3
3. multiply numbers 
--12/2*3
- -12/6
4. Apply fraction rule -a/b=- a/b
=-(-12/6)
5. divide 
= -(-2)
6. Apply rule -(-a)=a
=2
 Your answer would be 2