12/5 is the answer!
Hope I helped!
Ps: symbolab.com is a great calculator to help solve those type of problems :-)
Answer:
1={5 and 3} 2={0} 3={0.209 and 4.791} 4={-3 and 4} 5={1 and 9} 6={-4.303 and -0.697}
Step-by-step explanation:
Your probably confused on what a, b, and c means.
The problems are written like this.

That formula finds the zeros.
For example 1:

Then use the formula

If plus then 5, if minus then 3
CHECK:

Hope this helps you understand how to do this by yourself. Now to do the rest ;-;
The function that has the same graph as x + y = 11 is f(x) = -x + 11
<h3>Graph of functions</h3>
From the question, we are to determine the function that has the same graph as the given equation
The given equation is
x + y = 11
In the above equation, y is the dependent variable.
and
Among the given equation, f(x) is the dependent variable
Thus, we can write that
x + f(x) = 11
Isolate f(x)
f(x) = -x + 11
Hence, the function that has the same graph as x + y = 11 is f(x) = -x + 11
Learn more on Graph of functions here: brainly.com/question/20388062
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5.25x + 3.50 = total
Constant is the value without an x
Co of variable is always before the x