Answer:
Step-by-step explanation:
(x , y) = (1 , 5)
Now substitute into the eqn.
y = x + 1
5 = 4 + 1
=> This is correct
=> Therefore, it is on the line
2C^2 + 6 - 5C + 4
=2C^2 -5C + 10
Answer:
A
Step-by-step explanation:
The profit for selling <em>x</em> pairs of shoes is given by:

And we want to determine the number of pairs that needs to be sold in order to maximize profit.
Since the function is a quadratic with a negative leading coefficient, the maximum profit will occur at its vertex point. The <em>x-</em>coordinate of the vertex of a quadratic is given by:

In this case, <em>a</em> = -4, <em>b</em> = 32, and <em>c</em> = -39. Substitute and evaluate:

So, in order to maximize profit, only four pairs of sohoes should be sold.
Our answer is A.