Answer:
3 mph
Step-by-step explanation:
Let c represent the current of the river in miles per hour. Then the ratio of speed downstream to speed upstream is ...
(21 +c)/(21 -c) = 2.4/1.8
1.8(21 +c) = 2.4(21 -c) . . . . . . multiply by 1.8(21-c)
37.8 + 1.8c = 50.4 -2.4c . . . . eliminate parentheses
4.2c = 12.6 . . . . . . . . . . . . . . . add 2.4c-37.8
c = 3 . . . . . . . . . . . . . . . . . . . .divide by 4.2
The current of the river is 3 miles per hour.
Answer:
24a
Step-by-step explanation:
Answer: D, D, D, D
Step-by-step explanation: Bro, it's literally all just D
Answer:
Step-by-step explanation:
<u>According to the graph, the line has the following intercepts.</u>
- y - intercept of (0, - 3)
- x - intercept of (6, 0)
<u>The line equation is:</u>
<u>The slope is:</u>
- m = (0 - (-3)) / (6 - 0) = 3/6 = 1/2
<u>The line is:</u>
