- 4x from 8x = 4x
-9 + 19 = 4x -14
-9 + 19 = 10
10 = 4x -14
+14
24 = 4x 
divide by 4
X = 6
        
             
        
        
        
Answer:
Okay so this is simple addition, once you know how to do it. 
The interior angles of a triangle should always add up to 180 Degrees. 
Now that you know this, all you have to do is add the numbers together and see which ones add up to 180 degrees. 
A. - 90+42+58=190
B. - 60+60+60=180
C. - 100+48+42=190
D. - 31+75+70=176
Out of these choices the only one that adds up to 180 is B. So your answer would be B. 
Read more on Brainly.com - brainly.com/question/2547568#readmore
Step-by-step explanation:
 
        
             
        
        
        
Answer:
16 / C
Step-by-step explanation:
-4 x -4 = 16
4 x 4 = 16
two negatives cancel out when multiplying, that is why it equals 16*
 
        
                    
             
        
        
        
Answer:
680 cm
Step-by-step explanation:
There are 100 cm in 1 m, so multiply 6.8*10, which equals 680
hope this helps :)
 
        
             
        
        
        
Answer:
option-B
Step-by-step explanation:
we are given system of inequality as


now, we can check solution 
At (0,0):
we can plug x=0 and y=0
and check inequality


so, this is FALSE
now, we can check second inequality


So, this is TRUE
so, option-B