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ivanzaharov [21]
3 years ago
14

A bag contains 4 red marbles and 6 blue marbles. Brandon selects one marble from the bag. Without replacing the marble he then s

elects a second marble. What is the probability he selects a red marble given that he first selects a blue marble?
Mathematics
1 answer:
IgorC [24]3 years ago
4 0

The probability would be 4/15

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I do not understand this Can you please help.
Marrrta [24]

Answer: 1.7 is the answer hope this helps.

Step-by-step explanation:

4 0
3 years ago
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A hydraulic lift is to be used to lift a 2000-kg weight by putting a weight of 25 kg on a piston with a diameter of 10 cm. Deter
grigory [225]

Answer:

88 centimeters is the diameter of the cilinder

Step-by-step explanation:

The pressure on both ends of the lift must be the same. Assuming the piston is cilindrical, its area will be A=π*r² where r is half the diameter

Since pressure P=F/A And P1=P2

F1=2000kg.g

A1=π*r²

F2=25kg.g

A2=π*0.05²

2000/(π*r²)=25/(π*0.05²)

and we solve for A1

r²=2000*0.05²/25

r=\sqrt{\frac{2000*0.05^2}{25}}

r=\sqrt{5}20*0.05/5=0.44m or 44cm

This is the radius, meaning that the diameter will be twice this number

6 0
3 years ago
Read 2 more answers
Question 1
bogdanovich [222]

Answer: The percent of red lights last between  2.5 and 3.5 minutes = 95.44% approx.

Step-by-step explanation:

Given: Mean time = 3 minutes

standard deviation = 0.25 minutes

The probability of red lights last between  2.5 and 3.5 minutes :-

P(2.5

The percent of red lights last between  2.5 and 3.5 minutes = 95.44% approx.

7 0
2 years ago
Which comparison is not correct?
Elden [556K]

Answer:

it’s the third one

Step-by-step explanation:negatives are never higher than numbers without negatives

7 0
3 years ago
Explain why 3(x+4)=3(x−5)has no solution. Choose the best response below.
ankoles [38]

3(x+4)=3(x-5)\\3x+12=3x-15\\3x+12-3x+15=0\\27=0

The system of equations don't have any solutions due to the exact same x-terms.

For this both system of equations, the answer is A.

The x-terms are the same for the equation to be false.

The constant, however, is indeed different as shown in the equation.

7 0
3 years ago
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