Answer: SO if you hv to solve for x then the answer is 4/13. And if you wanna solve for y then the answer is 4.
Step-by-step explanation: solve for x=
13x+y=4
13x+0=4
x=4/13
Solve for y=
13(0)+y=4
y=4
15 squares + 15 squares =30 then you times 2.25 times 30 to get 67.5 the you do the other side 11 squares + 11 squares=22 squares then you times 22 squares by 2.25 and you get 49.5 then you add the 67.5+49.5=117
it would cost $117 to paint that.
Answer:
Step-by-step explanation:
The fish population after t years can be modeled by the following equation:
In which F(0) is the initial population and r is the constant rate of decay.
Year one the fish population was 18000
This means that 
In year three the fish population was 8000 fish.
Two years later, so 
So
The vertex is (-3,3),so a =-3, b=3. a+b=0
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