Answer:
The first blank is $640.30
The second blank is 670
Step-by-step explanation:
Answer:
The midpoint is 
Step-by-step explanation:
we know that
The formula to calculate the midpoint between two points is equal to

we have


substitute


Answer:

Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form
or
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
In this problem we have

Substitute the values and solve for k


therefore
the equation of the line is equal to

Because 3 is a number and the x is unknow so its just an exponent the x ^ 3 grows three each time
Answer:
Sorry im not sure on this one...
Step-by-step explanation: