You said that 'A is 30' right there in the equation
so it would be
Xsquared=30
Answer: 9 L
Step-by-step explanation:
Given
The dimension of the rectangular container is 
It is filled with
of the height
Water present in the container

Also, 

Now, half of the water is poured out
So, half is left

Thus, 9 L of water is left in the container
Answer:
Slope: 0.03
Y-intercept: 750
Equation of a line: y = 0.03x + 750
Step-by-step explanation:
See attached photo
Answer:
1 : 45
Step-by-step explanation:
Given
Rs 20 and 900 ( divide both by 20 )
= 1 : 45