Answer:
In a day, Nancy will earn $27.50. In a week, Nancy will earn $437.50.
Step-by-step explanation:
We have been given that Mark had $436.
Further, we are given that Chris has $86 lesser than what mark had.
Let us assume that Chris has $x. Therefore, we can set up an equation:
(Amount Chris had) + $86 = (Amount Mark had)

Upon subtracting 86 from both the sides, we get:

Therefore, the required expression that represent the amount of money that Chris had is
.
Answer:
The slope of the function is ²/₃ and since the second derivative is zero, the concavity doesn't exist.
Step-by-step explanation:
Given;
x = 6t
y = 4t - 3
point t = 4

The slope of the function is ²/₃
take the second derivative of the function;
the second derivative will be zero since the first derivative is a constant value.

Since the second derivative is zero, the concavity doesn't exist.
The answer is 29.
I hope it helps if not pls let me know