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Andrews [41]
3 years ago
15

PLEASEE HELP ME!!!!!

Mathematics
1 answer:
nadya68 [22]3 years ago
5 0
22 but used a calculator I may be wrong!
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Convert 13 to fifths.<br> Write your answer as a fraction.
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Step-by-step explanation:

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A paddleboat can move at a speed of 4 ​km/h in still water. The boat is paddled 12 km downstream in a river in the same time it
Bas_tet [7]

Answer:

Speed of the river = \frac{4}{3} km per hour

Step-by-step explanation:

Speed of the boat in still water = 4 km per hour

Let the speed of the river = v km per hour

Speed of the boat upstream = (4 - v) km per hour

Time taken to cover 6 km = \frac{\text{Distance}}{\text{Speed}}

                                           = \frac{6}{4-v} hours

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Time taken to cover 12 km = \frac{12}{4+v} hours

Since, time taken by the boat in both the cases is same,

\frac{6}{4-v}= \frac{12}{4+v}

6(4 + v) = 12(4 - v)

24 + 6v = 48 - 12v

12v + 6v = 48 - 24

18v = 24

v = \frac{24}{18}

v = \frac{4}{3} km per hour

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3 years ago
Simplify the rational expressions. State any excluded values. Show your work.<br> (x-2)/(x^2+3x-10)
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