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3 years ago

Help me plz I need it I'm very desperate help

Mathematics

2 answers:

Klio2033 [76]3 years ago

8 0

Answer:

1/45

Step-by-step explanation:

There are 10 marbles

P ( yellow) = yellow marbles / total = 2/10 = 1/5

We do not replace the marble

There are 9 marbles, 1 of which is yellow

P ( yellow) = yellow marbles / total = 1/9

P ( yellow, no replacement, yellow) = 1/5 * 1/9 = 1/45

vampirchik [111]3 years ago

3 0

The answer is 1/45 because you multiply 2/10 by 1/9, which are the probabilities of both situations.

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If f(x)=3x-1 and g(x)=x+2 find (f+g)(x)

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The area of a circle with radius r is given by the formula A=πr2. If a circle has area 81π square inches, what is the radius (in

Ksenya-84 [330]

The Solution:

GIven:

$A=\pi r^2$

Required:

$Find\text{ }r\text{ when }A=81\pi in^2$

Substitute:

$\begin{gathered} \pi r^2=81\pi \\ \\ r^2=\frac{81\pi}{\pi}=81 \end{gathered}$

Take the square root of both sides:

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1 year ago

Please help!! And pls show work

coldgirl [10]

<h3>The answer to your question is k (-3) = 21!</h3>

Here's how I got this answer:

K(a) = 2a^2 - a

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)K(-3) = 2(9) + 3

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)K(-3) = 2(9) + 3K (-3) = 18 + 3

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)K(-3) = 2(9) + 3K (-3) = 18 + 3K (-3) = 21

I hope this helps!

Also sorry for the late answer, I just got the notification that you replied to my comment, I hope I came in time!

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3 years ago

Help me please can someone explain

serg [7]

Answer:

Step-by-step explanation:

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eimsori [14]

Answer:

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Step-by-step explanation:

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2 years ago