To answer this item, we have 4 as the speed of the kayaker in still water and the speed of current be y.
When the karayaker moves upstream or against the current, his speed would be 4 - y. Further, if he moves downstream or with the current, the total speed would be 4 + y. The time utilized for the travel is equal to the ratio of the distance and the speed.
Total time = 9/(4 - y) + 9/(4 + y) = 6
We multiply the equation by (4-y)(4+y)
9(4-y) + 9(4 + y) = 6(4-y)(4+y)
Simplifying,
72 = 96 - 6y²
Transposing all the constants to only one side of the equation and rearranging,
6y² = 96 - 72
y² = 4
y = 2
Hence, the speed of the river's current is 2 miles/hr. <em>The answer is letter B.) 2 miles/hour.</em>
18*(1/3) (or one third of eighteen) = 6 dogs
Answer: Using rise over run, the answer is 9/3 but if you want to simplify it, then it's 3/1 or 3.
Step-by-step explanation: Yw :3
Answer:
c, 85°
Step-by-step explanation:
95° + xz = 180° then
x = 180 ° - 95° = 85°
Answer:
C
A
H
F
Step-by-step explanation:
graph shows slope =2
2. slope is y2-y1 / x2-x1
(4-7)/(1-0)
-3
so A
3. slope is 28-18 / 4-2
10/2 = 5
so H
4. graph shows slope =1
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