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3 years ago

What’s 20% Of 1 million

Mathematics

2 answers:

Jlenok [28]3 years ago

7 0

The answer is <span>200000................</span>

ser-zykov [4K]3 years ago

4 0

200,000 is 20% of 1,000,000

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If 2^n + 1 is an odd prime for some integer n, prove that n is a power of 2. (H

vovikov84 [41]

Step-by-step explanation:

We will prove by contradiction. Assume that $2^n + 1$ is an odd prime but n is not a power of 2. Then, there exists an odd prime number p such that $p\mid n$ . Then, for some integer $k\geq 1$ ,

$n=p\times k.$

Therefore

$2^n + 1=2^{p\times k} + 1=(2^{k})^p + 1^p.$

Here we will use the formula for the sum of odd powers, which states that, for $a,b\in \mathbb{R}$ and an odd positive number $n$ ,

$a^n+b^n=(a+b)(a^{n-1}-a^{n-2}b+a^{n-3}b^2-...+b^{n-1})$

Applying this formula in 1) we obtain that

$2^n + 1=2^{p\times k} + 1=(2^{k})^p + 1^p=(2^k+1)(2^{k(p-1)}-2^{k(p-2)}+...-2^{k}+1)$ .

Then, as $2^k+1>1$ we have that $2^n+1$ is not a prime number, which is a contradiction.

In conclusion, if $2^n+1$ is an odd prime, then n must be a power of 2.

4 0

3 years ago

Verify (−25) x [15 + (−5)] = [(−25) x 15] + [(−25) x (−5)

KengaRu [80]

Answer:

Take L.H.S and the R.H.S

Step-by-step explanation:

Taking L.H.S

-25*(15+(-5)

-25*(15-5)

-25*(10)

-250

Taking R.H.S

(-25*15)+(-25*(-5)

-375+125

-250

Verified

7 0

3 years ago

I need help with this question

KiRa [710]

I believe your answer is D) y= 3/4x + 7

4 0

3 years ago

A rental car company charges $150.00 for a weekly rental and an additional $0.20 for each mile driven. The function rule C = 0.2

son4ous [18]

Answer:

A rental car company charges $150.00 for a weekly rental and an additional $0.20 for each mile driven.

The function $C = 0.20m+ 150.00$ ,

where m is the number of miles and C is the total cost.

Since it is given that : If the rental car can only be driven a maximum of 200 miles.

Then the total cost for this is,

$C = 0.20 (200)+150$ or

$C= 40+150$

On simplify we get,

$C = \$ 190$

A rental Car can only be driven a maximum of 200 miles for a cost of $ 190.

Graph the function : $C = 0.20m+ 150.00$ as shown in the attachment.

7 0

3 years ago

If 50 is 20% of a value, what is that value?

AURORKA [14]

Answer:

The value is 250.

Step-by-step explanation:

It is 250, because if 20% is 50, you need to Multiply it 5 times to get to 100%.

8 0

3 years ago

Read 2 more answers