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sveticcg [70]
3 years ago
10

PLEASE PLEASE PLEASE HELP ME​

Mathematics
1 answer:
qaws [65]3 years ago
5 0

Answer:

\large\boxed{\dfrac{1}{45}}

Step-by-step explanation:

1.

2 yellow marables of 10 all marables

P(A_1)=\dfrac{2}{10}=\dfrac{1}{5}

2.

1 yellow marable of 9 all marables

P(A_2)=\dfrac{1}{9}

P(A)=P(A_1)\cdot P(A_2)\\\\P(A)=\dfrac{1}{5}\cdot\dfrac{1}{9}=\dfrac{1}{45}

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What are the solutions of x2 = 8 - 5x?
jonny [76]

Answer:

That can be re-written:

x^2 + 5x -8 = 0

We use the Quadratic Formula

a=1

b = 5

c = -8

x = [-b +- sq root (b^2 - 4ac) ] / 2a

x = [-5 +- sq root (25 - - 32)] / 2

x1 = [-5 + sq root (57)] / 2

x1 = 1.27491722

x2 = [-5 - sq root (57)] / 2

x2 = -6.2749172176

Step-by-step explanation:

5 0
3 years ago
If f(x) = 3x + 2, what is f(5)?
Andrei [34K]

Answer:

f(5) = 17

Step-by-step explanation:

You just plug in 5 for x:

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f(5) = 15 +2

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Hope this helps!

5 0
3 years ago
Read 2 more answers
What value of P makes the equation true 12-p+5=9<br> P=4<br> P=6<br> P=8<br> P=16
harkovskaia [24]

Answer:

p= 8

Step-by-step explanation:

just collect the like terms together

12+5-9= p

p= 8

7 0
2 years ago
How many times greater is the value of 3 in 300 than the value of the 3 in 30
Vikki [24]
Well it sounds like you mean smaller, not greater. 3/300 = 1/100 while 3/30 = 1/10. So 3 out of 300 is 10 times SMALLER than 3 out of 30. 

3 0
3 years ago
Read 2 more answers
Please simplify this ITS URGENT !!
frutty [35]

Answer:

5 {x}^{2}  - 4x -  3

Step-by-step explanation:

(8 {x}^{2}  - 5x + 1) - (3 {x}^{2}  - x + 4) \\  = 8 {x}^{2}  - 5x + 1 -  3{x}^{2}  + x - 4 \\  = 5 {x}^{2}  - 4x - 3

5 0
3 years ago
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