Answer:
Step-by-step explanation:
Given the system of equations:
You can pply Substitution method:
First you must solve for "y" from the first equation:
Therefore, the second and final step to solve the system of equations is to substitute the value of "y" into the second equation and solve for "x":
Using the vertex of the quadratic function, it is found that:
a) The maximum number of customers in the store is at 12 P.M.
b) 75 customers are in the store at this time.
The number of customers in x hours after 7 AM is given by:
Which is a quadratic equation with coefficients
Item a:
The maximum value, considering that a < 0, happens at:
Hence:
5 hours after 7 A.M, hence, the maximum number of customers in the store is at 12 P.M.
Item b:
The value is y(5), hence:
75 customers are in the store at this time.
A similar problem is given at brainly.com/question/24713268