3
The equation you use to find the average rate of change, or slope, is
Answer:
x = (125,0) y = (0,275)
Step-by-step explanation:
I think this is right, good luck!
70 times .9 is 63 so 90 minus 63 is27 so it was $27
Going upstream: 432 km / 6 hours = 72 km/h
Going downstream: 384 km / 4 hours = 96 km/h
Going upstream against the current means that the effective speed is:
r_boat - r_current = 72
Meanwhile, going downstream with the current means;
r_boat + r_current = 96
Adding both equations (to cancel out r_current) gives:
2r_boat = 72 + 96
r_boat = 84 km/h
Substituting back into one of the original equations: r_current = 12 km/h.
