Answer:
13/6
Step-by-step explanation:
1 Simplify  \sqrt{8} 
8
   to  2\sqrt{2}2 
2
 .
\frac{2}{6\times 2\sqrt{2}}\sqrt{2}-(-\frac{18}{\sqrt{81}})
6×2 
2
 
2
  
2
 −(− 
81
 
18
 )
2 Simplify  6\times 2\sqrt{2}6×2 
2
   to  12\sqrt{2}12 
2
 .
\frac{2}{12\sqrt{2}}\sqrt{2}-(-\frac{18}{\sqrt{81}})
12 
2
 
2
  
2
 −(− 
81
 
18
 )
3 Since 9\times 9=819×9=81, the square root of 8181 is 99.
\frac{2}{12\sqrt{2}}\sqrt{2}-(-\frac{18}{9})
12 
2
 
2
  
2
 −(− 
9
18
 )
4 Simplify  \frac{18}{9} 
9
18
   to  22.
\frac{2}{12\sqrt{2}}\sqrt{2}-(-2)
12 
2
 
2
  
2
 −(−2)
5 Rationalize the denominator: \frac{2}{12\sqrt{2}} \cdot \frac{\sqrt{2}}{\sqrt{2}}=\frac{2\sqrt{2}}{12\times 2} 
12 
2
 
2
 ⋅ 
2
 
2
 
 = 
12×2
2 
2
 
 .
\frac{2\sqrt{2}}{12\times 2}\sqrt{2}-(-2)
12×2
2 
2
 
  
2
 −(−2)
6 Simplify  12\times 212×2  to  2424.
\frac{2\sqrt{2}}{24}\sqrt{2}-(-2)
24
2 
2
 
  
2
 −(−2)
7 Simplify  \frac{2\sqrt{2}}{24} 
24
2 
2
 
   to  \frac{\sqrt{2}}{12} 
12
2
 
 .
\frac{\sqrt{2}}{12}\sqrt{2}-(-2)
12
2
 
  
2
 −(−2)
8 Use this rule: \frac{a}{b} \times c=\frac{ac}{b} 
b
a
 ×c= 
b
ac
 .
\frac{\sqrt{2}\sqrt{2}}{12}-(-2)
12
2
  
2
 
 −(−2)
9 Simplify  \sqrt{2}\sqrt{2} 
2
  
2
   to  \sqrt{4} 
4
 .
\frac{\sqrt{4}}{12}-(-2)
12
4
 
 −(−2)
10 Since 2\times 2=42×2=4, the square root of 44 is 22.
\frac{2}{12}-(-2)
12
2
 −(−2)
11 Simplify  \frac{2}{12} 
12
2
   to  \frac{1}{6} 
6
1
 .
\frac{1}{6}-(-2)
6
1
 −(−2)
12 Remove parentheses.
\frac{1}{6}+2
6
1
 +2
13 Simplify.
\frac{13}{6}
6
13
 
Done
 
        
             
        
        
        
Answer:
b=20 yards
Step-by-step explanation:
15^2+x^2=25^2
225+x^2=625
x^2=400
x=20
 
        
             
        
        
        
2.385 can be written as 2385/1000, which is equivalent to 477/200. As a mixed number it is writte as 2 77/200. Hope I helped!
        
             
        
        
        
Answer:

Step-by-step explanation:
Given:


Substitution can be used to find the value of  :
:




Hope this helps :)
 
        
             
        
        
        
Answer:
Your answer is 17.5
Step-by-step explanation:
Turn your fraction into a decimal
2/5 = 0.4
Next multiply my given answer by 0.4
17.5 x 0.4 = 7
Therefore 17.5 is your final answer