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IrinaVladis [17]
3 years ago
8

There are 3 white marbles and 7 blue marbles in a bag.Jamie will randomly pick two marbles out of the bag without replacing the

first marble chosen. What is the probability of jamie' s picking 2 white marbles?
A. 1/15
B.1/18
C.1/20
D.1/7
PLEASE HELP
Mathematics
2 answers:
finlep [7]3 years ago
8 0
(3/10)*(2/9)=6/90 which reduces to 1/15 which is A
masha68 [24]3 years ago
8 0

Answer: A. \frac{1}{15}

Step-by-step explanation:

Given: The number of white marbles = 3

Total number of marbles =3+7=10

Since, Jamie will randomly pick two marbles out of the bag without replacing the first marble chosen.

The probability of Jamie' s picking 2 white marbles is given by :-

\text{P(2 white)}=\frac{3}{10}\times\frac{2}{9}=\frac{1}{15}

Hence, the probability of Jamie' s picking 2 white marbles =\frac{1}{15}

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Please Help Me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
GuDViN [60]

Answer:

(-2, 11) and (2, 3)

Step-by-step explanation:

<u>Given system of equations:</u>

1) f(x) = x² - 2x + 3 ⇒ y = x² - 2x + 3

2) f(x) = -2x + 7 ⇒ y = -2x + 7

Solve Using the Substitution Method:

<u>Step 1:</u> Substitute the the first equation into the second.

⇒ x² - 2x + 3 = -2x + 7

<u>Step 2:</u> Solve for x.

x² - 2x + 3 = -2x + 7 [ Add 2x to both sides. ]

x² - 2x + 2x + 3 = -2x + 2x + 7

⇒ x² + 3 = 7 [ Subtract 3 from both sides. ]

x² + 3 - 3 = 7 - 3

⇒ x² = 4 [ Take the square root of both sides. ]

√x² = √4

x = ± 2

⇒ x = -2, x = 2

<u>Step 3:</u> Solve for y.

<em>Substitute the found x-values into one of the given equations.</em>

y = -2x + 7 ⇒ y = -2(-2) + 7 ⇒ y = 4 + 7 ⇒ y = 11

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The solutions to the system of equations are: (-2, 11) and (2, 3).

Learn more about system of equations here:

brainly.com/question/26094713

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5 0
2 years ago
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Honestly, I'm trying my best to solve this but my Math XL is being so rude. ​
Valentin [98]
<h3>Answer:  19</h3>

==============================================================

Explanation:

T is the midpoint of PQ, which means T splits PQ into two equal parts. Those parts being PT and TQ.

Set them equal to each other and solve for x.

PT = TQ

3x+7 = 7x-9

3x-7x = -9-7

-4x = -16

x = -16/(-4)

x = 4

So,

PT = 3x+7 = 3*4+7 = 19

TQ = 7x-9 = 7*4-9 = 19

Both PT and TQ are 19 units long to help confirm the answer.

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2 years ago
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