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siniylev [52]
3 years ago
6

Is 0.71428571428 a rational number

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
6 0

Is 0.71428571428 a rational number?

Yes!

...because it is 5 divided by 7.

5 divided by 7 is 0.71428571428

Alex787 [66]3 years ago
5 0
No, since it a repeating(terminating) decimal, so it is not a rational number.

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If 1 yard = 3 feet and 1 mile = 5,280 feet, how many yards are there in 2 miles? 2,640 yards 3,520 yards 10,560 yards 31,680 yar
fiasKO [112]

To solve this, you first have to find the number of yards in one mile.

If three feet = 1 yard, and 5280 ft = 1 mile, all you have to do to find the number of yards in a mile is divide 5280 feet by 3 feet.

You end up with 1760 yards in 1 mile.

To find the number of yards in 2 miles, all you would have to do is multiply 1760 by 2

<h3>1760 x 2 = <u>3520 yards</u></h3>
6 0
3 years ago
alpha and beta are the zeros of the polynomial x^2 -(k +6)x +2(2k -1). Find the value of k if alpha + beta = 1/2 alpha beta(ITS
serious [3.7K]

Answer:

k=\frac{-11}{2}.

Step-by-step explanation:

We are given \alpha and \beta are zeros of the polynomial x^2-(k+6)x+2(2k-1).

We want to find the value of k if \alpha+\beta=\frac{1}{2}.

Lets use veita's formula.

By that formula we have the following equations:

\alpha+\beta=\frac{-(-(k+6))}{1}  (-b/a where the quadratic is ax^2+bx+c)

\alpha \cdot \beta=\frac{2(2k-1)}{1} (c/a)

Let's simplify those equations:

\alpha+\beta=k+6

\alpha \cdot \beta=4k-2

If \alpha+\beta=k+6 and \alpha+\beta=\frac{1}{2}, then k+6=\frac{1}{2}.

Let's solve this for k:

Subtract 6 on both sides:

k=\frac{1}{2}-6

Find a common denominator:

k=\frac{1}{2}-\frac{12}{2}

Simplify:

k=\frac{-11}{2}.

7 0
3 years ago
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3 years ago
PLEASE HELP ME WITH ALGEBRA!! THANK YOU!!
DerKrebs [107]

Answer:

okiii!

Step-by-step explanation:

what's the question?????

6 0
3 years ago
Read 2 more answers
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