Answer:
Demetrius's account is $84 higher after the two transactions
Step-by-step explanation:
Let
x -----> original amount in Demetrius's account
y ----> amount in Demetrius's account after the deposit and the withdraws
we know that
The amount in Demetrius's account after the two transactions must be equal to the original amount in Demetrius's account plus the deposit minus the withdraws
so


therefore
Demetrius's account is $84 higher after the two transactions
 
        
             
        
        
        
Answer:
   50 miles
Step-by-step explanation:
Multiply the given scale numbers by 1/2 to find your answer:
   1/2 in = 100 mi
   (1/2)(1/2 in) = (1/2)(100 mi) . . . . multiply the ratio values by 1/2
   1/4 in = 50 mi
 
        
             
        
        
        
Answer:
20
Step-by-step explanation:
12 divided by 3/5 is equal to 20
 
        
                    
             
        
        
        
Given:
pool length : 10 yards
pool width : 8 yards
Area = 10 yds * 8 yds = 80 yd²
(10 + 2x)(8 + 2x) = 120 
10(8 + 2x) + 2x(8+2x) = 120
80 + 20x + 16x + 4x² = 120
4x² + 36x + 80 - 120 = 0
4x² + 36x - 40 = 0
4(x² + 9x - 10) = 0
4(x + 10)(x - 1) = 0
x + 10 = 0
x = -10
x - 1 = 0 
x = 1
the width of the deck is 1 yard
        
             
        
        
        
It would be the first one because it’s going up by a constant rate