R = speed in still water
r + c = speed with current
r - c = speed against current
3.5(r + c) = 70
r + c = 20
c = 20 - r
4(r + c) = distance from pier to pier
5(r - c) = distance from pier to pier
4(r + c) = 5(r - c)
4(r + 20 - r) = 5(r - 20 + r)
80 = 10r - 100
180 = 10r
18 = r
The speed in still water is 18 km/hour
Answer:
A common mistake is doing x2-x1/y2-y1 instead of the correct slope formula which is y2-y1/x2-x1
Step-by-step explanation:
Him doing the surgerys / treating the patient
Answer:
8 feet squared
Step-by-step explanation:
The area of bedroom 1 is 2 length and 3 width. multiply them and you get 6ft^2 plus the 2 squares on the right.
Answer:
5 is in the ten thousands place.
Step-by-step explanation:
Since the number to the left of 5, 2, is in the hundred thousands place, and the number to the right, 7, is in the thousands place, 5 is in the ten thousands place.
I hope this helped! :-)
