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Mrac [35]
3 years ago
14

If you roll a number cube 30 times, how many times do you expect to roll a five

Mathematics
1 answer:
andrezito [222]3 years ago
5 0

Answer:

5

Step-by-step explanation:

There are 6 numbers on a die, one of them is 5 so we expect to get a five one of six times

P (5) = 1/6

If we roll the die 30 times, we expect to get a five 30 * 1/6 = 5 times

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Consider the absolute value equation x+2=3
Anna007 [38]
X would equal 1 in this problem since 1+2=3 and the absolute value(s) in this equation would be -1+(-2)=3 since, a negative plus a negative equals a positive.

I hope this helped you!
3 0
4 years ago
A group of friends went out for dinner and decided to split the cost of the bill equally. If each person contributed $32, the fr
lianna [129]

Answer:

The number of friends that went out for dinner is 8

And their bill is $238

Step-by-step explanation:

Let's assume that the number of friends that went out for dinner to be x

And the bill for the dinner to be y

If each person contributed $32 and paid off the bill,they will have a balance of $18

32x - 18 = y_____equation 1

If each person contributed $35 and paid off the bill and also 15% tip,they will have a balance of $6.30

35x - 6.3 = y + (15% of y)

35x - 6.3 = y + (3y/20)

Open up the bracket

35x - 6.3 =(20y + 3y)/20

700x - 126 = 23y______equation 2

From equation 1,y = 32x - 18

Put the above in equation 2 and we have

700x - 126 = 23(32x -18)

700x - 126 = 736x - 414

collect like terms

36x = 288

x = 288/36

x = 8

Remember that equation 1 says that y = 32x - 18 and we now know that x = 8 .

Substitute and we have

(32 × 8) - 18

y = 238

The number of friends that went out for dinner is 8

And their bill is $238

3 0
3 years ago
Which number is a rational number?
erik [133]

Answer:

C

Step-by-step explanation:

17.156 is the irrational number as it is terminating(means it ends)

Rest all are irrational

8 0
3 years ago
How do you write 31/50 as a percentage7k
Len [333]
31/50

31 ÷ 50 = 0.62

0.62 x 100 = 62%

So the answer is 62%

Hope this helps I didn't know if the 7k was apart of the problem or a typo

4 0
3 years ago
Read 2 more answers
easy question... if someone starts with 100$ and adds 50 each week, how much will they have after 1 year
dimulka [17.4K]

Answer:

They would have about $2500 after one year

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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