What happens if you fail just one elective in 7th grade?
2 answers:
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Answer:
The people can seat themselves in 20160 different ways.
Step-by-step explanation:
Arrangements of n elements:
The number of arrangements of n elements is given by the following formula:
In this question:
For the first seat, that is, the driver seat, 4 possible people can sit.
For the remaining 7 seats, the number of ways in which the people can sit is an arrangement of 7 elements. So
The people can seat themselves in 20160 different ways.
Answer:
x = ±
It didn't insert but just look up the quadratic formula.
x = ± root [(b²-4ac]/2a]