The general equation of a line is y = mx +b.
m is equal to the slope, so for this problem it is m = -3
b is equal to the y-intercept (the y-point when x = 0) so according to this since it passes through (0, -2), x=0 at y = -2
The equation of the line is: y = -3x - 2
Suppose that all work that has to be done is 1. Then:
- One crew can do this work in 10 hours. This means that they will do
per hour. - Another crew can do this work in 14 hours.This means that they will do
per hour. - Both crews together will do
per hour.
If together they can do
per hour, then for all work they will spend
hours or 5 hours 50 minutes.
Answer: 5 hours 50 minutes.
Answer:
C
Step-by-step explanation:
River valley provided fertile land and access to water.
Not:
dense forests: hard to navigate, not suitable for ancient civilizations
mountain passes: same reason as above
smooth coastlnes: settlements potentially could be washed away or destroyed. Access to fresh, non-salt water, also was harder than that of settling in river valleys