The given equation is 
By solving the given equation, we get


While solving the equation,we get 0=0.
Therefore, the given equation is true for all the values of y.
Hence, we can say that the given equation has infinite number of solutions.
We are asked to find the area of patio. It is circular so formula used for area is given by:

Where
r = radius = diameter / 2 = 20 / 2 = 10 feet

When we round this to the nearest whole number:
Answer:
You probably don't need the answer still but here's it anyways- $1.50
Step-by-step explanation:
12 - 9 = 3
3 divided by 2 = 1.5
$1.50
Answer:
x=4 y=8
Step-by-step explanation:
Solve for the first variable in one of the equations, then substitute the result into the other equation