Answer:
The solution to the system of equations is

Explanation:
Giving the system of equations:

To solve this, we need to first of all eliminate one variable from any two of the equations.
Subtracting (2) from twice of (1), we have:

Subtracting (3) from 3 times (1), we have

From (4) and (5), we can solve for y and z.
Subtract 5 times (5) from 3 times (4)

Using the value of z obtained in (5), we have

Using the values obtained for y and z in (1), we have
Answer:3hrs 16min
Step-by-step explanation:
392/120 = 49/15 hours = 3 hours + 4/15 hours = 3 hours + 4/15 x 60 min = 3 hours + 16 min
Inverse proportion is of the form:
y=k/x, in this case the variables are
z=k/x, and we are given the point (6,2) so we can solve for k
2=k/6
12=k, so our equation is:
z=12/x, so when x=13
z=12/13
Ya have to round it to the nearest hundred, so that would be 2 thousand.
so it's 4,552,000