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3 years ago

A circular running track is 1/2 mile long. Elena runs on this track, completing each lap in 1/10 of an

Mathematics

2 answers:

Aliun [14]3 years ago

7 0

Answer:

5 mph

Step-by-step explanation:

1/2 mile in 1/10 of an hour

1 mile in 1/5 of an hour

5 miles in 1 hour

fomenos3 years ago

3 0

The answer might be wrong but

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Convert 2/5 to per cent

kozerog [31]

Answer:

40%

Step-by-step explanation:

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3 years ago

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A Boxerville Express commuter train leaves the station every 30 minutes. When Theo arrives at the station, a woman tells him she

Dmitrij [34]

Answer: D

The answe is just simply D because of the minutes when it adds up is almost the same as MPH

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3 years ago

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The first term of a sequence is13<br> The term to term is take away 5<br> work out the 4th term

stepladder [879]

Answer:

-2

Step-by-step explanation:

-2

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3 years ago

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Prove that an = 4^n + 2(-1)^nis the solution to

olga nikolaevna [1]

Answer:

See proof below

Step-by-step explanation:

We have to verify that if we substitute $a_n=4^n+2(-1)^n$ in the equation $a_n=3a_{n-1}+4a_{n-2}$ the equality is true.

Let's substitute first in the right hand side:

$3a_{n-1}+4a_{n-2}=3(4^{n-1}+2(-1)^{n-1})+4(4^{n-2}+2(-1)^{n-2})$

Now we use the distributive laws. Also, note that $(-1)^{n-1}=\frac{1}{-1}(-1)^n=(-1)(-1)^{n}$ (this also works when the power is n-2).

$=3(4^{n-1})+6(-1)^{n-1}+4(4^{n-2})+8(-1)^{n-2}$

$=3(4^{n-1})+(-1)(6)(-1)^{n}+4^{n-1}+(-1)^2(8)(-1)^{n}$

$=4(4^{n-1})-6(-1)^{n}+8(-1)^{n}=4^n+2(-1)^n=a_n$

then the sequence solves the recurrence relation.

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3 years ago

Find the slope of the line thru the points<br> (2,-4) and (7,6).

Reptile [31]

Answer:

m = 10 / 5 = 2 / 1 = 2

Step-by-step explanation:

8 0

3 years ago