Answer: x is 90 
Step-by-step explanation:
because x-20 is equal to 70 
 
        
             
        
        
        
Answer:
A) 7x^2-7x+15
Step-by-step explanation:
f(x) = 4x2 - 5x + 7,
g(x) = 3x2 - 2x + 8
f(x) +g(x) = 
4x^2 - 5x + 7 + 3x^2 - 2x + 8=
7x^2-7x+15
 
        
             
        
        
        
12 x 16 = 192. So, the room is 192 square feet.
        
                    
             
        
        
        
Answer:
x = 10°
Step-by-step explanation:
Step 1:
92° + x° + 78° = 180°             Supplementary Angles 
Step 2:
x° + 170° = 180°         Combine Like Terms
Step 3:
x° = 180° - 170°       Subtract 170° on both sides
Answer:
x = 10°
Hope This Helps :)