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Bond [772]
3 years ago
6

For every left handed person, there are about 4 right-handed people. If there are 30 students in a class, predict the number of

students who are right-handed
Mathematics
2 answers:
Snezhnost [94]3 years ago
4 0

Answer:

24

Step-by-step explanation:

30/5=6

1•6=6 Left handed

4•6=24 Right handed

EleoNora [17]3 years ago
4 0

Answer:about 24


Step-by-step explanation:

this is because if you add 1 lefty and 4 righty you get 5 total. Now, you divide 30÷5=6. Then 30-6=24. here you go.

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Check the forward differences of the sequence.

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a_{n+1} = (a_{n-3} + 2(n-2)) + 2((n+1)+n+(n-1)) \\ ~~~~~~~= a_{n-3} + 2 ((n+1) + n + (n-1) + (n-2))

and so on down to

a_{n+1} = a_1 + 2 \displaystyle \sum_{k=2}^{n+1} k = 2 + 2 \times \frac{n(n+3)}2

\implies a_{n+1} = n^2 + 3n + 2 \implies \boxed{a_n = n^2 + n}

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