Answer:
280cm^2
Step-by-step explanation:
I am only looking for the shaded region which is 20 and 14 and 20*14=280 
so my final answer will be 280cm^2
 
        
             
        
        
        
Answer:
n=21
Step-by-step explanation:
We must find n.
Remember PEMDAS. First we must do the Parentheses. Lets do distributive property by multiplying a number that is immediately outside the parentheses with each number inside the parentheses. Lets do this one side at a time.
First lets do 5(n - 7). We get 5n - 35
Now 2(n + 14) is 2n + 28
Okay...... now we have 
Now lets do OPPOSITES!!!! We must do the opposite of each thing to both sides.
The opposite of -35 is positive 35. Lets add 35 to both sides. We get:

Now lets do the opposite of 2n which is -2n

this is looking quite nice isnt it..........
The opposite of 3 times n is 3 DIVIDED BY n. So lets divide both sides by 3

amazing.......
 
        
                    
             
        
        
        
Answer:
The answer is "  "
"
Step-by-step explanation:
Given value:

Find:
area=?
calculation:

         
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
I remember it by: 
acute: a cute little angle that is smaller than 90 degrees