Answer:
18
Step-by-step explanation:
6 times 3 equals 18
4 times 3 equals 12 plus 6 equals 18
Speed, S = Distance (d) / Time (t) => S= d/t => t= d/S
Let the speed of boat in still water be x mph
Resulting speed upstream = x-4 mph for a distance of 30 miles
Resulting speed downstream = x-4 mph for a distance of 50 miles
Time taken in both distances is equal.
Therefore,
30/(x-4) = 50/(x+4) => 30(x+4) = 50(x-4) => 30x+120 = 50x-200 => 120+200 = (50-30)x => 20x = 320 => x=320/20 = 16 mph
The speed of boat in still water is 16 mph.
Answer:
The answer is A
Step-by-step explanation:
cross mutliply
1×6=6
1×3=3
divide the answers
result: 2
I hope this helps
Answer:
(7x+5)(7x+5)
Step-by-step explanation:
Factor 25+70x+49x2
49x2+70x+25
=(7x+5)(7x+5)
Answer:
(7x+5)(7x+5)
Hope this helps!
