Answer: 5^2 
Step-by-step explanation:
Since the base are all the same, you will add the exponents and let the exponents stay the same.
5^3  * 5^4= 5^7 * 5^-5= 5^2 
 
        
                    
             
        
        
        
Answer:
13 + 3x= 31
Step-by-step explanation:
 
        
             
        
        
        
Answer:
C.
Step-by-step explanation:
all you do is go look and see which one is in the exact same spot
 
        
                    
             
        
        
        
Answer: A 
Hope this helps!
        
             
        
        
        
Answer:
u = -5/9
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
-3(u + 2) = 5u - 1 + 5(2u + 1)
<u>Step 2: Solve for </u><em><u>u</u></em>
- Distribute:                             -3u - 6 = 5u - 1 + 10u + 5
- Combine like terms:             -3u - 6 = 15u + 4
- Add 3u to both sides:          -6 = 18u + 4
- Subtract 4 on both sides:    -10 = 18u
- Divide 18 on both sides:      -10/18 = u
- Simplify:                                -5/9 = u
- Rewrite:                                 u = -5/9
<u>Step 3: Check</u>
<em>Plug in u into the original equation to verify it's a solution.</em>
- Substitute in <em>u</em>:                     -3(-5/9 + 2) = 5(-5/9) - 1 + 5(2(-5/9) + 1)
- Multiply:                                -3(-5/9 + 2) = -25/9 - 1 + 5(-10/9 + 1)
- Add:                                      -3(13/9) = -25/9 - 1 + 5(-1/9)
- Multiply:                                -13/3 = -25/9 - 1 - 5/9
- Subtract:                               -13/3 = -34/9 - 5/9
- Subtract:                               -13/3 = -13/3
Here we see that -13/3 does indeed equal -13/3.
∴ u = -5/9 is a solution of the equation.