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shutvik [7]
2 years ago
8

Question 1(Multiple Choice Worth 1 points)

Mathematics
2 answers:
bagirrra123 [75]2 years ago
7 0

Answer:

It is 120 minutes

Step-by-step explanation:

I know this question

ra1l [238]2 years ago
5 0
It’s 120 minutes because it would be two hours but there not putting it into hours there putting it into minutes and 1 hour is 60 minutes so two hours is 120 minutes
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7 girls audition for 12 roles in a school play. What is the probability that at least 2 of the girls audition for the same part?
Sophie [7]

Answer:

Step-by-step explanation:

This is one minus the probability that all the girls audition for different roles. The total number of ways of assigning roles to the girls is 12^7, because to each of the 7 girls, you have a choice of 12 roles.

Then if each girl is to receive a different role, then there are 12!/5! possibilities for that. If you start assigning roles to the girls, then for the first girl, there are 12 choices, but for the next you have to choose one of the 11 different ones, so 11 for the next, and then one of the 10 remaining for the next etc. etc., and this is 12*11*10*...*6 = 12!/(12-7)! =12!/5!

The probability that a random assignment of one of the 12^7 roles would happen to be one of the 12!/5! roles where each girl has a different role, is

(12!/5!)/12^7 = 12!/(12^7 5!)

Then the probability that two or more girls addition for the same part is the probability that not all the girls are assigned different roles, this is thus:

1 - 12!/(12^7 5!)

6 0
2 years ago
What is the following product? Assume x greater-than-or-equal-to 0 (4 x StartRoot 5 x squared EndRoot + 2 x squared StartRoot 6
makvit [3.9K]

Answer:

D

Step-by-step explanation:

(4x√5x^2 +2x^2√6)^2 

remove the last ^2 by multiplying the parenthesis by each other:

(4x√5x^2 +2x^2√6) * (4x√5x^2 +2x^2√6)

 use FOIL & distribute :

4x√5x(4x√5x +2x^2√6) +2x^2√6(4x√5x +2x^2√6)

apply the distributive property once more:

4x^2√5(4x^2√5)+ 4x^2√5(2x^2√6) + (2x^2√6(4x^2√5) +2x^2√6(2x^2√6)

remove parenthesis and combine like terms to get:

104x^4+16x^4√30

 answer is D

4 0
2 years ago
Read 2 more answers
Simplify: −3x(4x − 5xy + 8y)
777dan777 [17]

Answer:

-12x - 9xy

Step-by-step explanation:

-3x(4x - 5xy + 8y)

distribute

-12x + <u>15xy - 24xy</u>

combine like terms

-12x - 9xy

3 0
2 years ago
Please please please Factor 9x - 27xy
Kamila [148]

Common factor of 3x

3x ( 3x+9xy)( 1+0)

7 0
2 years ago
8 persons attended an interview at a company where each person can be either selected or rejected. find the number of ways of an
Ganezh [65]
2 possibilities for each person, for 8 people
= 2*2*2*2*2*2*2*2
=2^8
= 256 ways of announcing the result
5 0
2 years ago
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