Yes or course. PEMDAS
Parenthesis
Exponents
Multiplication-Division (solve left to right)
Addition- Subtraction (solve left to right)
example, lets take a simple equation.
32+6x7-1+4²
Let's solve it left to right 
You're answer would be 281
But when using PEMDAS your answer is- 89
Check out this video for extra help.
https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/...
        
                    
             
        
        
        
The answer is c=250 feet because the circumference is twice the radio us I’m pretty sure.
        
                    
             
        
        
        
Answer:
un-distribute the GCF of the two numbers.
16(1 + 3)
Distributing we get:
16(1) + 16(3)
16 + 48
Step-by-step explanation:
:)
 
        
             
        
        
        
The answer is 8 because a negative number times or divide by a negative number the answer will be a positive number.