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3 years ago

PLS i need help! and an explanation

Mathematics

1 answer:

serious [3.7K]3 years ago

6 0

Answer:

C) 10.101

Step-by-step explanation:

A terminating decimal is one that is not repeating and ends at some point.

The line over the 3 in A means that it's a repeating decimal.

$\sqrt{10}$ is an irrational number, so it never ends.

The line over the 6 in D means that it's a repeating decimal.

C is the right answer because 10.101 has a definite endpoint :)

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Solve for x in the equation x2-8x+41=0

Alinara [238K]

Answer:

d) 4 ± 5i

Step-by-step explanation:

Here we have to use the quadratic formula.

x = $\frac{-b +/- \sqrt{b^2 - 4ac} }{2a}$

In the given equation x^2 - 8x + 41 = 0, a =1, b = -8 and c = 41

Now plug in the given values in the above formula, we get

x = $\frac{-(-8) +/- \sqrt{(-8)^2 - 4*1*41} }{2*1}$

Simplifying the above, we get

x = $\frac{8 +/- \sqrt{64 - 164} }{2}$

x = $\frac{8 +/- \sqrt{-100} }{2}$

[√-100 = √-1 *√100 = i*10 = 10i] because the value of √-1 = i]

x = (8 ± 10i )/2

Now dividing by 2, we get

x = 4 ± 5i

The answer is d) 4 ± 5i

Hope you will understand the concept.

Thank you.

3 0

2 years ago

Read 2 more answers

Radius= 4cm. find the area and diameter of the circle

Bezzdna [24]

<h3>given:</h3>

radius= 4 cm

the area and the diameter of the circle.

<h3>solution:</h3><h3>diameter:</h3>

$d = 2r$

$d = 2 \times 4$

$d = 8 \: cm$

therefore, the diameter of the circle is 8 centimeters.

$a = \pi {r}^{2}$

$a = \pi \times {4}^{2}$

$a = 50.26548 \: {cm}^{2}$

$a = 50.27 \: {cm}^{2}$

hence, the area of the circle is 50.27 square centimeters.

6 0

2 years ago

Read 2 more answers

Whats the place value of the decimal in the number 125.6

allsm [11]

Answer:

in between the ones and the tenths place

Step-by-step explanation:

so it would be in the ones place

3 0

2 years ago

-7w>49 Anybody know thing one?

mash [69]

Answer:

w < -7

____________________

You mean this thing one?

6 0

2 years ago

A voter polling research group determined that 30% of the voters in a county would vote for the democratic candidate with a ±4%

Mila [183]

Answer:

Minimum number of voters for the democratic candidate would be 3120 voters.

Step-by-step explanation:

Total number of people turning out to vote = 12,000

Percentage of votes a democratic would get = 30%

Which means that it is expected that a democratic candidate will get: 30/100 · 12,000 = 3600 votes

However, the polling may have an error of +4% to -4%

Which means that the votes a democratic candidate will get will range from 30%+4% = 34% to 30%-4%= 26% of the total people who turn out to vote

Minimum number of voters can be determined by taking 26% of the total people who turn out to vote:

Minimum number of votes = 26/100 · 12,000 = 3120

8 0

2 years ago