Answer:
1.5 meters
Step-by-step explanation:
If she is already below sea level by 1 meter and she goes down .5 meters more, she would be 1.5 meters below the sea level.
 
        
             
        
        
        
Answer:
a) (11/7, 9/7)
b) There's no point of intersection
Step-by-step explanation:
a) x - 2y + 1 = 0
2x + 3y - 7 = 0
To find the point of intersection, we need to solve the system of equations  and the result will be the point of intersection (x,y)

Now we substitute x in the second equation: 

Now we substitute y in our first equation.
 .
.
The point of intersection is (11/7, 9/7)
b) x -2y +11 =0
-x + 2y - 13 =0
We are going to follow the same procedure:


Since this system of equations doesn't have a solution, the system has no point of intersection. 
 
        
             
        
        
        
The inverse operation of division is multiplication.
        
             
        
        
        
Options 1 does not represent a function
        
                    
             
        
        
        
Answer:
60%
Step-by-step explanation:
percent of green marbles = (total number of green marbles / total number of marbles in the bag) x 100 
total number of marbles in the bag = 30 + 20 = 50 
30 / 50 x 100 = 60%