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3 years ago

BRAINLIEST!!- Find 0.25of 40

Mathematics

1 answer:

ipn [44]3 years ago

7 0

Answer: 25% of 40 or 0.25 of 40 is 10.

Step-by-step explanation:

Basically you have to divide 40 by 10 because 1/4 of 100 is 25. 25 is 1/4 of 100.

So knowing this 40/0.25 is equal to 10. This is why 0.25 of 40 is 10.

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Solve plz plz try i have this being graded

Y_Kistochka [10]

It's w=2z+3

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4 years ago

Use induction to show that 12 + 22 + 32 + ... + n2 = n(n+1)(2n+1)/6, for all n > 1.

dlinn [17]

Answer with Step-by-step explanation:

Let $P(n)=1^2+2^2+3^2+.....+n^2=\frac{n(n+1)(2n+1)}{6}$

Substitute n=2

Then $P(2)=1+2^2=5$

$P(2)=\frac{2(2+1)(4+1)}{6}=5$

Hence, P(n) is true for n=2

Suppose that P(n) is true for n=k >1

$P(k)=1^2+2^2+3^2+...+k^2=\frac{k(k+1)(2k+1)}{6}$

Now, we shall prove that p(n) is true for n=k+1

$P(k+1)=1^2+2^2+3^2+...+k^2+(k+1)^2=\frac{(k+1)(k+2)(2k+3)}{6}$

LHS

$P(k+1)=1^2+2^2+3^2+.....+k^2+(k+1)^2$

Substitute the value of P(k)

$P(k+)=\frac{k(k+1)(2k+1)}{6}+(k+1)^2$

$P(k+1)=(k+1)(\frac{k(2k+1}{6})+k+1)$

$P(k+1)=(k+1)(\frac{2k^2+k+6k+6}{6})$

$P(k+1)=(k+1)(\frac{2k^2+7k+6}{6})$

$P(k+1)=(k+1)(\frac{2k^2+4k+3k+6}{6})$

$P(k+1)=\frac{(k+1)(k+2)(2k+3)}{6}$

LHS=RHS

Hence, P(n) is true for all n >1.

Hence, proved

4 0

3 years ago

On July 1, Black Corporation had 200,000 shares of $10 par common stock outstanding. The market price of the stock was $12 per s

Yakvenalex [24]

Answer:

$4000000

Step-by-step explanation:

Given data :

200000 shares at $10 par common stock outstanding

market price of stock = $12 per share

increased par value of stock = $10 ( $20)

Black's paid-in capital--excess of par account = $4000000.

The balance in Black's paid-in capital--excess of par account immediately after the reverse stock spit will be $4000000 because the increased par value of stock from $10 to $20 will be reversed back immediately after the reverse stock hence the paid-in capital--excess before stock split = paid-in capital --excess immediately after reverse stock split

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4 years ago

Is -3x+5=-3x+8 infinate many solutions

Gekata [30.6K]

Answer:

yes

Step-by-step explanation:

4 0

4 years ago

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