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>
It takes that car 17 miles to use up 1 gallon of gas, meaning that if the car would have travelled 34 miles, it would have used to gallons of gas.
(A) perpendicular bisector of FH
(B) except median of XYZ
Another one apply
Hope it helps!
Answer:
XC SXC CX VXVXVSD CSD CSDC SD VDS V DSV DVF VFV DFXV DXF VXVD XV DX V DXVDX
Step-by-step explanation:
Photo math will help u with any math problems..just take a picture of it and it give u the answer and the steps to it