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Serjik [45]
3 years ago
9

In how many ways can a president and a vice president be randomly selected from a class of 20 students?

Mathematics
1 answer:
SpyIntel [72]3 years ago
7 0

Answer:

n how many ways can a president, vice president, and a secretary be chosen? It is 12X11X10. Permutation of n things taken r at a time: nPr=n!/(n-r)! 12P3=12*11*10*9!/9!= 12*11*10=1320 ways.

Step-by-step explanation:

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Please help this is so difficult
White raven [17]

Answer:

B

Step-by-step explanation:

For a line to be parallel it must have the same slope

6x-2y=-5

+5        +5

6x-2y+5 = 0

   +2y       +2y

6x+5  =2y

/2        /2

3x+5/2=y                  So the slope is 3 and we know it can only be either B or D

Now we need to find which line passes through (7,-2) and we find this by plugging 7 into B and D

B. -2= 21-23 TRUE

D. -2 = 21+ 23 FALSE

So the answer is B

7 0
3 years ago
A swearer cost $20 but the price was reduced to $ 12 what was the price after the price was reduced
bixtya [17]

Answer:

$20-$12=

Step-by-step explanation:  

20-12=8

5 0
3 years ago
What is a equivalent fraction and decimal to 3 ones and 7 hundreths
nasty-shy [4]
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So equivalent fraction is 3 7/100 or 307/100.
Equivalent decimal is: 3.07
4 0
3 years ago
Read 2 more answers
During a period of 30 working days, Deborah was late 80% of the time. How many days was she late?
erik [133]
Fairly straightforward question. She works 30 days and is late 80% or 0.8
We can model our equation
Num days late = late percentage * num working days
Basically fine portion of working days that she was late.

Num days late = 0.8 * 30=24

So Deborah was late 24 out of 30 working days. Would appreciate a brainliest
8 0
2 years ago
12 ft 9 in <br>08ft 10in<br>+11ft 4in​
Jobisdone [24]

Answer:

what is the question?

Step-by-step explanation:

7 0
3 years ago
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