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blsea [12.9K]
3 years ago
5

PLEASE HELP ASAP I DO NOT UNDERSTAND

Mathematics
1 answer:
lutik1710 [3]3 years ago
7 0
Hey just letting you know the picture won’t load
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Determine the average speed of the current in a river if a boat moves at 20 miles/hour in still water and takes 3 hours to trave
Taya2010 [7]

The speed of the current in a river is 6 miles per hour

<em><u>Solution:</u></em>

Given that,

Speed of boat in still water = 20 miles per hour

Time taken = 3 hours

Distance downstream = 78 miles

To find: Speed of current

<em><u>If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:  </u></em>

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

<em><u>Therefore, speed downstream is given as:</u></em>

\text{ speed downstream } = \frac{distance}{time} = \frac{78}{3}\\\\\text{ speed downstream } = 26 \text{ miles per hour }

We know that,

Speed downstream = (u + v)

26 = 20 + v

v = 26 - 20

v = 6 miles per hour

Thus speed of the current in a river is 6 miles per hour

3 0
3 years ago
How would the graph of the function y = r? - 8 be affected if the function were changed to y = x? - 3?
Leokris [45]
The graph would shift 5 units up
4 0
3 years ago
PLEASE HELP? I need help ASAP heh.
spayn [35]

Answer:

5/12

Step-by-step explanation:

12 total squares

5 shaded

5shaded to 12 total

5:12

or

5/12

5 0
2 years ago
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Kristen earns $13.50 for each hour she works. On Monday she worked 4 hours. She also worked Tuesday. If she earned a total of $1
insens350 [35]

Answer:8 hours on Tuesday

Step-by-step explanation:13.50 x 4=54

162-54=108

108÷13.50=8

8 0
3 years ago
Change the following improper to mixed plz help quick!<br> 1. 8/3<br><br> 2. 9/4<br><br> 3. 12/5
gayaneshka [121]

Answer:

Improper Fractions:

Step-by-step explanation:

1. 2 and 2/3

2. 2 and 1/4

3. 2 and 2/5

3 0
2 years ago
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