Answer:
$2.52
Step-by-step explanation:
Answer:
16 km/h ….. still water boat rate
4 km/h …. Current rate
Step-by-step explanation:
The speed of the boat supposed to be x km/h
The current rate is y km/h
(x + Y) * 3 = 60
(x – y) * 5 = 60
3x + 3y =60 ….. ①
5x – 5y = 60 ….. ②
① * 5 … 15x + 15y = 300 … ①’
② * 3 … 15x – 15y = 180 … ②’
①’- ②’ … 30y = 120
Y = 4 km/h …. Current rate
15x = 300 – 15*4 = 240
X = 16 km/h ….. still water boat rate
To solve this we would need to find 2/3 of 864. To make this simpler we can convert 2/3 into decimal form which can be found by dividing 2 by 3. This equals 0.6. Now we simply multiply 864 by 0.6 to get 518.4, if that is needed as a fraction it would be 518 2/5
So the sum of two sides are 2x+2y and the perimeter is 3x+3y. So if we subtract the two sides from the perimeter we will have the dimension of the final side....
3x+3y-2x-2y=x+y which is the same as the other two sides, thus this is an equilateral triangle.
...
Again we will subtract the sum of two sides from the perimeter to find the measure of the third side...
7x+2y-2x-y-3x+5y
2x+6y is the third side...
