Answer:
b
Step-by-step explanation:
b
 
        
                    
             
        
        
        
Answer:
her first mistake was on line 3. 
line 1: 80 + [2(3 1/2 + 1 1/2)]
line 2: 80 + [2(5)]
line 3: 80 + 10
line 4: 90
Step-by-step explanation:
on line 3 she added 80 + 2, but she should have multiplied 2 by 5. the correct steps would be:
line 1: 80 + [2(3 1/2 + 1 1/2)]
line 2: 80 + [2(5)]
line 3: 80 + 10
line 4: 90
 
        
             
        
        
        
Y = 10x + 4
 x                      y
-2  10(-2)+4 = -16
-1  10(-1)+4 = -6
0    10(0)+4 = 4
1    10(1)+4  = 14
2    10(2)+4 = 24
        
             
        
        
        
Answer:
Upward
Step-by-step explanation:
Use a graphing calculator
 
        
             
        
        
        
Answer:
131.88cm
Step-by-step explanation:
Implement the formula for circumference of a circle:
 2×pi(3.14)×r, r= 21cm and pi is given as 3.14. Substitute your given values into the formula above: 
2 × 3.14 × 21= 131.88cm to the nearest hundreth