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3 years ago

Which number produces an irrational number when added to 2/5

Mathematics

1 answer:

Slav-nsk [51]3 years ago

8 0

Any irrational number when added

to 2 / 5 still produces an irrational number.

For example, if we use π to add to 2/5

or 0.4. As far as we know the decimal digits for π just go on forever and do not

have a repeating cycle hence making it an irrational number. Adding a rational

number such as 0.4 to

the value of π

does not really greatly change the value of π. The decimal digits (hundredths place and so on) of

the resulting number will still go on forever without a continual repeat.

So 0.4 + π is

still irrational

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3 years ago

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8. Write the equation of the line that is parallel to the line 2x + 5y = 15 and passes through the

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Answer:

$\sf y = \bold -\frac{2}{5} x -3$

Explanation:

part A identification for slope:

$\sf 2x + 5y = 15$

$\sf 5y = -2x + 15$

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comparing with slope intercept form: y = mx + b

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part B, solving the equation:

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$\sf y = \bold -\frac{2}{5} x -4 + 1$

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Extra information:

check the image below. this proves that the line is parallel and passes through point (-10, 1). the blue line is question line and red the answer line.

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2 years ago

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4 years ago

In 2007, the population of Ecuador was estimated at

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Answer:

In 2012 , the population will be 15 million

Step-by-step explanation:

We start by setting up an exponential equation that defines the increase

P(t) = I(1 + r)^t

P(t) represents the present population = 15 million

I is the population in 2007 which is 13.8 million

r is 1.6% = 0.016

t is what we want to calculate

15 million = 13.8 million (1 + 0.016)^t

15/13.8 = (1.016)^t

1.09 = (1.016)^t

ln 1.09 = t ln 1.016

t = ln 1.09/ln 1.016

t = 5.429 which is approximately 5

So in 2007 + 5 = 2012, the population will be 15 million

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3 years ago