11w(w-22) Multiply 11w times each term in the parenthesis
 
 
        
        
        
First, multiply 50*3 to get the answer in feet which is 150 ft.
Then, divide 150 ft by 60 which would be 2.5 ft per second.
        
             
        
        
        
Answer:
10.36
Step-by-step explanation:
So your solution would be:








Just try to remember PEMDAS.
Parenthesis, Exponent, Multiplication/Division, Addition/Subtraction.
This is the order we follow when going about expressions with many operations. 
Let's start with the parenthesis part. Notice that there is an exponent beside the parenthesis enclosing the fraction. Here we use the quotient to a power rule. We distribute the exponent to the numerator and the denominator. 



Now that we got the parenthesis and exponent out of the way, let's move on to the next. Multiplication/Division. Whichever comes first, you do it first. 
We have a fraction so we do that first. Then we do the multiplication after. 


Next we do the addition/subtraction. Again, whichever comes first. 


 
        
             
        
        
        
Answer:
28
Step-by-step explanation:
40% 6th graders of 70 total = 28 6th graders
40% 6th graders + 20% 7th graders = 60% 
100% - 60% = 40% 8th graders
40% are 8th graders therefore the answer is 28