$540
Step-by-step explanation:
 $150 × 4 = $600
$600 ÷ 10 = $60
$600 - $60 = $540
 
        
             
        
        
        
Am I the only one that doesn’t get what the question is asking
I feel like 1 piece of information is missing
Like how much in a collection?
        
                    
             
        
        
        
Answer:
$1605
Step-by-step explanation:
Because this is simple interest, you can convert the 7% into a decimal
Because she payed an EXTRA 7% she payed 107% total
107% is the equivalent to 1.07
By multiplying 1500 x 1.07 = 1605
 
        
             
        
        
        
(85 + 84 + 78 + x) / 4 = 86
(247 + x) / 4 = 86
247 + x = 86 * 4
247 + x = 344
x = 344 - 247
x = 97 <=== her score was 97
        
                    
             
        
        
        
Answer:
b,c,d
Step-by-step explanation: