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3 years ago

10

There are 8 girls and 12 boys in your class. Based on the current ratio of girls to boys, what is the probability that a new kid

entering your class will be a boy?

1 answer:

anyanavicka [17]3 years ago

3 0

Answer:

Boy

Step-by-step explanation:

The ratio is 8:12, the ratio can be simplified to 2:3 and simply by looking at it, you have a chance of another boy, like a 3 in 2 chance

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Rashawn and Jessie are playing a game where they lose the same number of points that they would have earned for each incorrect a

KIM [24]

Answer: Rashawn is ahead

Step-by-step explanation:

2 x -3 = -6

4 x -2 = -8

-6 > -8

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3 years ago

A shopkeeper marked the price of a radio as Rs. 5000. He sold it allowing a discount of 10% and made a profit Rs. 500. Find the

marissa [1.9K]

SP = MP - discount% of MP
= 5000 - 10/100 X 5000
= Rs4500
Profit = SP - CP
= 4500-500
= Rs 4000
Hope it helps!

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3 years ago

Find the slope of the line y= -3x+7

Softa [21]

Answer:

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6 0

2 years ago

Differentiate x^2 e^x logx

zimovet [89]

Product rule:

$\dfrac{\mathrm d}{\mathrm dx}(x^2e^x\log x)$

$=\dfrac{\mathrm d(x^2)}{\mathrm dx}e^x\log x+x^2\dfrac{\mathrm d(e^x)}{\mathrm dx}\log x+x^2e^x\dfrac{\mathrm d(\log x)}{\mathrm dx}$

Power rule:

$\dfrac{\mathrm d(x^2)}{\mathrm dx}=2x$

The exponential function is its own derivative:

$\dfrac{\mathrm d(e^x)}{\mathrm dx}=e^x$

Assuming the base of $\log x$ is $e$ , its derivative is

$\dfrac{\mathrm d(\log x)}{\mathrm dx}=\dfrac1x$

But if you mean a logarithm of arbitrary base $b$ , we have

$y=\log_bx\implies x=b^y=e^{y\ln b}\implies1=e^{y\ln b}\ln b\dfrac{\mathrm dy}{\mathrm dx}$

$\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{e^{-y\ln b}}{\ln b}=\dfrac1{b^y\ln b}$

$\implies\dfrac{\mathrm d(\log_bx)}{\mathrm dx}=\dfrac1{x\ln b}$

So we end up with

$2xe^x\log x+x^2e^x\log x+\dfrac{x^2e^x}x$

$=xe^x(2\log x+x\log x+1)$

8 0

3 years ago

A +-21 = -38<br><br>help me please

ivann1987 [24]

Answer:

A= -17

Step-by-step explanation:

A +-21 = -38

+21 +21

-38+21= -17

A= -17

5 0

2 years ago

Read 2 more answers