Explanation:
Starting with the first option, the square root of 12 and 8 isn’t a perfect square so it definitely can’t be reduced to 3/2.
It is the same for the second option as well.
Third option :
Root of 36 is 6
Root of 16 is 4
6/4 = 3/2 
Fourth option: 
Root of 81 is 9
Root of 36 is 6
9/6 = 3/2 
Answer:
Therefore, the third and fourth options are the correct choices. 
Hope this helped!
        
             
        
        
        
Answer:
x = 4√5
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality<u>
</u>
<u>Trigonometry</u>
[Right Triangles Only] Pythagorean Theorem: a² + b² = c²
- a is a leg
- b is another leg
- c is the hypotenuse<u>
</u>
Step-by-step explanation:
<u>Step 1: Define</u>
Leg <em>a</em> = 8
Leg <em>b</em> = 4
Hypotenuse <em>c</em> = <em>x</em>
<em />
<u>Step 2: Solve for </u><em><u>x</u></em>
- Substitute in variables [Pythagorean Theorem]:                                            8² + 4² = x²
- Evaluate exponents:                                                                                         64 + 16 = x²
- Add:                                                                                                                   80 = x²
- [Equality Property] Square root both sides:                                                    √80 = x
- Rewrite:                                                                                                             x = √80
- Simplify:                                                                                                             x = 4√5
 
        
             
        
        
        
Height without rounding - 5.89 
5.89 
Rounded - 5.9 feet tall
        
                    
             
        
        
        
Additive indentity 

n = 1
a variable is always a number itself remember 7+n 
5+2 = 7
 
        
        
        
Answer:
6/8 and 12/16
Step-by-step explanation:
This is because 3/4 x 2/2 = 6/8 and 3/4 x 4/4 = 12/16