Simple,
since he has no money to begin with just write your equation..
E=6s
Which basically means, if he sells 1 shirt:
E=6(1)
E=$6
If he sells 2 shirts:
E=6(2)
E=$12
And so on and so forth, thus, your equation is E=6s.
Answer: z = 2
solution:
formula of z value is
z = x - μ / σ
so z = 40-30 / 5 = 10/5 = 2#
The slope of the line is 6/2 because if you start at the first point you go over 6 in the x direction (right) and then you have to go up in the y direction (up)
The equation of the piecewise function is 
<h3>The piecewise function</h3>
On the graph, we have:
- y = 3 for all x values not more than -1
- y = -1 for all values greater than 2
Hence, the piecewise function is:

<h3>The domain of the function</h3>
This is the set of input values
In (a), we have:
x ≤ -1 and x > 2
Hence, the domain is (∞, 3] u (2, ∞)
<h3>The range of the function</h3>
This is the set of output values
In (a), we have:
f(x) = 3 and f(x) -1
Hence, the range is [3] u (-1)
Read more about piecewise function at:
brainly.com/question/18859540
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