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ivann1987 [24]
3 years ago
10

If I roll a fair die 100 times, about how many times would I roll a 4?

Mathematics
2 answers:
WARRIOR [948]3 years ago
6 0

C. 17

Why:

Divide 100 by 6, round the answer and you should get 17

astra-53 [7]3 years ago
6 0

Answer:

C.) 17

Step-by-step explanation:

A die has  1,2,3,4,5,6

P(4) = number of 4's/ total numbers

       = 1/6

Multiply the number of roll's by the probability of getting a 4

100 *1/6 = 50/3 = 16 2/3

This is approximately 17

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Skyler goes to a school which has 1000 students in it.
Dmitry [639]

Answer:

it's estimated that 750 students in the whole school dislike the 8:30am start time.

Step-by-step explanation:

Since 30 of the 40 students said "no", it means 30/40, or 3/4 of the random sample disliked the 8:30am start time. Multiply this by the whole population: 1,000 × (3/4) = 750.

Another way to check this is using 10/40 = .25 and doing 1000x.25 = 250 (the amount of students who liked it). Then subtract from whole population and it's 750.

5 0
1 year ago
A party rental company has chairs and tables for rent. The total cost to rent 3 chairs and 5 tables is $39 . The total cost to r
IrinaVladis [17]
3c + 5t = 39....multiply by -3
9c + 7t = 63
----------------
-9c - 15t = - 117 (result of multiplying by -3)
9c + 7t = 63
---------------add
- 8t = - 54
t = -54/-8
t = 6.75 <=== tables are 6.75

3c + 5t = 39
3c + 5(6.75) = 39
3c + 33.75 = 39
3c = 39 - 33.75
3c = 5.25
c = 5.25/3
c = 1.75 <=== 1.75 per chair
7 0
3 years ago
Can you help me with question 6 please
Licemer1 [7]
I'm pretty sure the answer is 24
4 0
3 years ago
Your classmate is starting a new fitness program. He is planning to ride his bicycle 60 minutes every day. He burns 7 calories p
zaharov [31]
Let the time he spent bicycling at 11 mph be x and the time spent bicycling at 15 mph be y, then
x + y = 60 . . . (1)
7x + 11.75y = 600 . . . (2)
(2) x 7 => 7x + 7y = 420 . . . (3)
(2) - (3) => 4.75y = 180
y = 180 / 4.75 = 38
x = 60 - 38 = 22

Therefore, he should bicycle 22 minutes at 11 mph and 38 minutes at 15 mph.
6 0
3 years ago
Which equation is equivalent to 3x^2 + 24x + 15 = 0?
ozzi

Answer:

x^2+8x+5=0

Step-by-step explanation:

Well, they all can be divided by 3. So it would be x^2+8x+5=0

6 0
3 years ago
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