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saw5 [17]
2 years ago
7

A bowl contains 7 pennies, 9 nickels, and 4 dimes. Elyse removes one coin at random from the bowl and does not replace it. She t

hen removes a second coin at random. What is the probability that both will be dimes?
Mathematics
1 answer:
Vlad [161]2 years ago
6 0

Answer:

The probability is 3/95

Step-by-step explanation:

Okay this is a probability without replacement question.

Firstly we calculate the total number of coins = 7 + 9 + 4 = 20 coins

The probability that the first coin will be a dimes = number of dimes/total number of coins = 4/20 = 1/5

Now she removes a coin without replacement, if it was a dime, total number of coins becomes 19 and the total number of dimes becomes 3; Thus the probability of the second coins being a dimes = 3/19

Thus, the probability of both coins being dimes = probability of first coin being dimes * probability of second coins being dimes

= 1/5 * 3/19 = 3/95

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Antonio rented a bike from Alberto's Bikes. It cost $11 plus $4 per hour. If Antonio paid
Nina [5.8K]

Answer:

5 hours

Step-by-step explanation:

31-11 = 20

20/4 = 5

6 0
2 years ago
What is the slope of the line passing through the ponts (3,3) and (5,7)?
antoniya [11.8K]
This problem has a slope of 2

7-3. 4
----- = ---. = 2
5-3. 2
6 0
3 years ago
Read 2 more answers
Victor bought a Nintendo Game Boy that cost $68. He received $32 in change.
I am Lyosha [343]
68+32=100 he used a $100 bill
6 0
2 years ago
3[-x + (2 x + 1)] = x - 1<br><br><br> what is x
Nataly_w [17]

The answer you are looking for is x=-2.

Solution/Explanation:

Writing out the equation

3[-x+(2x+1)]=x-1

Simplifying inside of the brackets first

Combining like terms, since -x+2x=x

3(x+1)=x-1

*You can remove the parenthesis, if preferred.

Using the Distributive Property on the left side of the equation

3x+3=x-1

Now, subtracting the "x" variable from both sides

3x+3-x=x-x-1

"x-x" cancels out to 0.

3x+3-x=-1

Combining like terms and simplifying

3x-x+3=-1

2x+3=-1

Subtracting 3 from both sides of the equation

2x+3-3=-1-3

"3-3" cancels out to zero.

2x+0=-1-3

2x=-1-3

Simplifying the right side of the equation

2x=-4

Finally, dividing both sides by 2

2x/2=-4/2

Simplifying the final part of the problem

Since 2x/2=x and -4/2=-2

x=-2

So, therefore, the final answer is x=-2.

Hope that this has helped you. Good day to you.

4 0
2 years ago
141 is what percent of 94?
Alexxandr [17]

Answer:

150%

Step-by-step explanation:

141/94 =

141 ÷ 94 =

1.5 =

1.5 × 100/100 =

1.5 × 100% =

(1.5 × 100)% =

150%;

5 0
2 years ago
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