Answer:
$16.25
Step-by-step explanation:
Half a gallon for $2.50 is the same as a quarter a gallon for $1.25.
If she needs 3.25 gallons, which is 13 quarters, we do $1.25 * 13 = $16.25.
Therefore, she will spend $16.25.
 
        
             
        
        
        
Answer:
x = 4
Step-by-step explanation:
110ₓ = 40₅    --------- change all to base ten.
<u>the system called binary</u>
1x²+1x ¹+0x⁰ = 45¹+0*5⁰
x² + x + 0 = 20
x² + x – 20 = 0
solve x using Quadratic equation
         -1 ± 
x =  ------------------------------------
                         2 * 1
x = -5;  x = 4
therefore, x = 4
 
        
             
        
        
        
Answer:
6.06%
Step-by-step explanation:

 
        
             
        
        
        
Im pretty sure it’s All students in each grade because it says she wants the sample from the ^entire^school
        
                    
             
        
        
        
Answer:
D
Step-by-step explanation:
they both equal each other. 5x+7=9x-63
then you would take 70 divided by 4
which equals 17.5