She bought it at a 15% discount because 15 percent of 40 is 6 and 40-6=34
Answer:
7
Step-by-step explanation:
I just want points
Answer:
perimeter = 32-4y
Step-by-step explanation:
perimeter = 2(length +width)
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.
737 people I’m pretty sure
