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3 years ago

How can you simplify 18/30?

Mathematics

2 answers:

coldgirl [10]3 years ago

5 0

Answer:

3/5

Step-by-step explanation:

Think: What's the greatest common factor of 18 and 30? It's 6.

Starting with 18/30, divide both numerator and denominator by 6, obtaining:

3/5

Kamila [148]3 years ago

5 0

Answer:

Simplified it would be 3/5

Step-by-step explanation:

Start by dividing them by any common factor that they both have. Both are divisible by 3, so we divide both numbers by 3.

18/3 = 6

30/3 = 10

6/10

At this point, both numbers are still divisible by 2, so we divide them again.

6/2 = 3

10/2 = 5

3/5

Since these numbers share no factors, we know we are done.

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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

Solution:

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

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

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

Therefore, speed downstream is given as:

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

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

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3 years ago

HI HELP ME W MATH PLSS!!

4vir4ik [10]

Answer:

a) 79.6

b) 437.8

Step-by-step explanation:

First, you have to do 318.4/4 to find the rate she goes in the duration of an hour. The rate is 79.6, which means she travels at a rate of 79.6 kilometers per hour.

Then, you have to find the distance she takes to travel in 5.5 hours, so you have to do 5.5*79.6 which is 437.8.

So, Hannah travels 437.8 kilometers in 5.5 hours.

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3 years ago

Writing lan's car can go 180 miles on 5 gallons of gas. During a drive last weekend, lan used

MrRissso [65]

Answer:

288 miles

If we have the distance, we divide by 36 instead to find how many gallons of gas he used.

Step-by-step explanation:

180/5=36 miles per gallon

8 gallonsx36 miles per gallon=288 miles

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3 years ago

Divide 2,756 into 1,375,244

alexgriva [62]

Answer:

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Step-by-step explanation:

you take 1,375,244/2,756=499

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Answer:

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