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Serhud [2]
3 years ago
8

Erica and Amy started biking in the opposite directions at the same time from the same place. Erica biked at a speed of 6 meters

per second and Amy biked at a speed of 4 meters per second. How soon were they exactly 1 km apart?
Mathematics
1 answer:
ipn [44]3 years ago
3 0
Since they are moving in opposite directions, this is the same as Amy staying still and Erica biking at 10 meters per second away from her.

To travel 1km = 1000m at 10 meters per second, you need 1000/10 = 100 seconds.
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Fantom [35]

Answer:

x = 5, RT = 18

Step-by-step explanation:

\triangle MNL \sim \triangle SRT... (given) \\\therefore \frac{MN}{SR} = \frac{NL}{RT}.. (c.s.s.t)\\ \\ \therefore \frac{84}{24} = \frac{63}{3x+3}\\ \\ \therefore \frac{7}{2} = \frac{63}{3x+3}\\ \\ \therefore 3x+3 = \frac{63\times 2}{7}\\ \\ \therefore 3x + 3 = 9\times 2\\\therefore 3x + 3 = 18\\\therefore 3x = 18 - 3\\\therefore 3x=15\\\therefore x = \frac{15}{3}\\\huge \red {\boxed {\therefore x = 5}} \\ \\ \because RT = 3x + 3\\\therefore RT = 3\times 5+ 3\\\therefore RT = 15+ 3\\\huge \orange {\boxed {\therefore RT = 18}}

7 0
3 years ago
Find (f•f)(x) when f(x) = x^2-2 and g(x)= x-1
UkoKoshka [18]

Answer:

Solution

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Step-by-step explanation:

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6 0
2 years ago
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SpyIntel [72]
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3 0
3 years ago
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lesya692 [45]

Answer: fluffy is 11 years old

Scuffy is 8 years old

Step-by-step explanation:

Let x represent the present age of Fluffy the cat.

Let y represent the present age of Scuffy the dog.

Fluffy the cat is 3 years older than Scuffy the dog. This means that

x = y + 3 - - - - - -- - - - - 1

Six less than five times Scruffy's age is one more than three times Fluffy's age. This means that

5y - 6 = 3x + 1

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5y - 3x = 7 - - - - - - - - - -2

Substituting equation 1 into equation 2, it becomes

5y - 3(y + 3) = 7

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2y = 16

y = 16/2 = 8

x = y + 3

x = 8 + 3 = 11

6 0
3 years ago
2/5×3/7+3/10+1/14×2/5​
Irina-Kira [14]

The answer is 1/2

please see the attached picture for full solution

Hope it helps

4 0
2 years ago
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