we have

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Factor the leading coefficient
----------> the value of A is 
Complete the square. Remember to balance the equation by adding the same constants to each side


Rewrite as perfect squares


therefore
the answer is
the value of A is 
From the above problem, we
can create the equation:
P = 245 + 20 t
where P is the total payment that
Johnny receives and t is the total time he worked
Given that P = 2245, so find for
t:
2245 = 245 + 20 t
t = 100 hours
Answer:
Step-by-step explanation:
A. Price is 1.75
Total revenue, if number of galsses equals X is 1.75X
Total cost function of X glasses of lemonade is 25+0.1X
Profit function is Revenue - Cost, P=1.75X-25-0.1X=1.65X-25
C. Marginal profit= d/dx(1.65x-25) = 1.65-0=1.65
X=300 glasses, P'(300)=1.65
X=700 glasses, P'(700)=1.65