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o-na [289]
4 years ago
12

two trains ,each 100 m long,moving in opposite directions ,cross each other in 8 seconds .if one is moving twice as fast as the

other train ,then the speed of the faster train is​
Mathematics
1 answer:
Feliz [49]4 years ago
8 0

Answer:

60 km/hr

Step-by-step explanation:

100+100

_______         =3x

      8

3x= 200/8

x=200/24 mps

=30mph

final speed is 60km/hr because its 2x's more =2*30=60

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In a park, the ratio of adults to children is 11 to 9. If there are 320 people in the park, how many children are there?
Ludmilka [50]

Answer:

144

Step-by-step explanation:

320 ÷ 20 = 16

adults : children

11 : 9

9×16 = 144

5 0
3 years ago
Write the number in word form and in standard form 300,000,000+40,000,000+7,000,000+300,000+10,000+6,000+20+9
Citrus2011 [14]
Three hundread and forty-seven million three hundread and sixteen thousand and twenty-nine....347,316,029
4 0
3 years ago
A certain number was multiplied by 7. 4 was taken away from the product. Finally, that difference was then divided by 9, resulti
marin [14]

Answer:

7

Step-by-step explanation:

To solve this, we have to work backwards. If you divide something by 9, and it equals 5, to figure out the number, we need to multiply by 9. 5*9= 45. If four was taken away, we have to add it to 45, which is 49. If a number *7 is 49, then we have to divide by 7 to get the answer. 49/7=7  

7 0
4 years ago
Four friends buy cinema tickets using this offer. Cinema tickets buy 3 tickets and get a ticket free they each pay £6.15 how muc
laila [671]

The cost of one ticket will be  £8.20

<em><u>Explanation</u></em>

Suppose, the cost of one ticket is x

As the offer says "buy 3 tickets and get a ticket free" , it means <u>they actually need to pay for 3 tickets</u>.

So, the total cost of 3 tickets =3x

Each of four friends pay £6.15 , so the <u>total amount they pay</u> =\£6.15 *4 = \£24.60

Thus, the equation will be .....

3x=24.60\\ \\ x=\frac{24.60}{3}=8.20

So, the cost of one ticket will be  £8.20

7 0
3 years ago
Solve 5n -14≤11 <br>*10 points*​
Sedbober [7]

Answer:

n ≤ 5

Step-by-step explanation:

First, we add 14 to both sides. This gets us 5n ≤ 25. Next, we divide both sides by 5. This gets us n ≤ 5. I hope this helps!

4 0
3 years ago
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