Answer:
6 complete costumes
Step-by-step explanation:
he has 27/2 total fabric
1 costume requires 1 2/4 + 3/4 of fabric, which is 2 1/4
we divide 27/2 by 9/4
27/2 x 4/9 = 6
 
        
             
        
        
        
X × 75% = £45
x = £45 / 75%
x = £45 / 0,75
x = £60
        
             
        
        
        
Answer:
 (90)(7) ⇒ the error was multiplying 90 and 7.
Step-by-step explanation:
12(597) = 12(500 + 90 + 7) 
             = 12(500) + (90)(7) 
              = 6000 + 630 
                 = 6,630 
The part in bold shows where the error is. It was not correct to multiply 90 and 7. 
The process was to proceed as follows:
12(597) = 12(500 + 90 + 7) 
             = 12(500) + 12(90) + 12(7) 
              = 6000 + 1080 + 84
                 = 7,164
 
        
             
        
        
        
Your going to want to first distribute the negative out to the second equation
65x+50y-16x+21y
49x+71y