Answer: 315 cookies
Step-by-step explanation: 73+242 = 315
 
        
                    
             
        
        
        
Answer: 1. Correct, 2. Incorrect 90° angle not 80° angle answer is 50, 3. Is correct, 4. Is correct
 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
no
Step-by-step explanation:
12 squared plus 5 squared=169
 
        
             
        
        
        
Original height = original width = x mm
1. She made an enlarged copy...
height = 2x
width = 2x
2. She cut off a rectangle...
height = 2x
width = 

3.She doubled the width...
height = 2x
width = 

height * width = area

Original height was 
162 mm