Answer:
ur answer is right it is 9
Step-by-step explanation:
NOTE: divide the number 36 with 4 and u will get 9
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Answer:
the answer should be D
Step-by-step explanation:
:)
Solution
Let take boat speed = x
Current speed = 4
Upstream = x - 4
Downstream = x + 4
Distance = 9
Time upstream + Time downstream = 10
Time = Distance/Speed
9/(x + 4) + 9/(x - 4) = 10
Solving this equation 9(x-4)+9(x+4) = 10(x^2 -16)
9x - 36 + 9x + 36 = 10x^2 - 160
18x = 10x^2 -160
10x^2 -18x - 160 = 0
Now solving the above quadratic equation, we get
x = 5 or x = -16/5
We ignore the negative value.
The answer is 5.
The speed of the boat in still water is 5mph.
Thank you.
Answer:
61.5
Step-by-step explanation:
PEMDAS
Parentheses
Exponents
Multiplication and Division
Addition and Subtraction
There is a Parentheses so we do it first:
6.5 times 4 is 26
We don't have any exponents so it is multiplication next since we don't have any division
26 times 2.25
58.5+5-2
We go from left to right
58.5+5 is 63.5
63.5-2 is 61.5
Thus the answer is 61.5
Hope this helps!