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2 years ago

14

Geoff has a bag that contains 4 red marbles and 6 blue marbles. He chooses two marbles at random and does not replace them. What

is the probability that the first marble is blue and the second marble is red? A. B. C. D.

2 answers:

Margaret [11]2 years ago

7 0

Answer:

The answer is 4/15 hopefully this helps!

Virty [35]2 years ago

6 0

Answer: $\frac{4}{15}$

<u>Step-by-step explanation:</u>

First pick (blue) and Second pick (red)

$\frac{6}{10}$ x $\frac{4}{9}$

= $\frac{6(4)}{10(9)}$

= $\frac{2(2)}{5(3)}$

= $\frac{4}{15}$

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2 1/2xâˆ’34(2x+5)=3/8 what id X ?

Phantasy [73]

2 because I looked it up on google

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2 years ago

horsena [70]

Answer:

$t=5$ dollars per t-shirt

Step-by-step explanation:

<em>Read the problem and write your equation while following along with it</em>

We have 8 t-shirts

Lets 8 t-shirts be represented by 8t

So for our equation we will place and $8$

<h3>Our equation: $8t$ </h3><h3 />

Now it says we have a coupon that subtracts 4 dollars from our total

<h3>Our equation: $8t-4$ </h3><h3 />

The final part to add to our equation says that our total before tax was 36 dollars

<h3>So here is our equation: $8t-4=36$ </h3><h3 />

<em>add </em> $$$ $4$ <em> to both sides</em>

$8t=40$

<em>Divide both sides by</em> $8$

$t=5$ dollars per t-shirt

-Side note, make sure to spell your question right. It was a tad bit confusing to read at the start.

-Brainliest please :)

4 0

2 years ago

Please help with this question, I need the help urgently

grin007 [14]

Answer:

P in terms of V is:

P = 432/V

Step-by-step explanation:

We know that y varies inversely as x, we get the equation

y ∝ 1/x

y = k/x

k = yx

where k is called the constant of proportionality.

In our case,

P is inversely proportional to V

Given

P = 18

V = 24

so

P = k/V

k = PV

substituting P = 18 and V = 24 to determine k

k = 18 × 24

k = 432

now substituting k = 432 in P = k/V

P = 432/V

Therefore, P in terms of V is:

P = 432/V

5 0

3 years ago

Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

c) We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$

Part a

We want this probability:

$P(X$

And for this case we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a} = \frac{x-0}{20-0}= \frac{x}{20}$

And using the cumulative distribution function we got:

$P(X$

For the probability $P(X>14)$ if we use the cumulative distribution function and the complement rule we got:

$P(X>14) = 1-P(X$

Part b

We want this probability:

$P(7< X$

And using the cdf we got:

$P(7< X$

Part c

We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

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2 years ago

Help to solve math,<br> I have not solve

aivan3 [116]

...........Hope this helps :)

7 0

3 years ago