Answer:
The 2nd one/Green
Step-by-step explanation:
A plane figure with five straight sides and five angles.
Answer:
x = 4; x = -4
Step-by-step explanation:
|3x| = 12
3x = 12
3x/3 = 12/3
x = 4
3x = -12
3x/3 = -12/3
x = -4
<span> To get an explicit formula, we need to find an expression which gives the n-th term without having to compute earlier terms in the sequence. Looking at the numbers, and from the recursive formula, we see that the sequence is built by subtracting n from the previous term. This is similar to the triangular number sequence 1,3,6,10,15,... which has the explicit formula a_n = n(n+1)/2. In our case we are subtracting n from the previous term, so we multiply by -1/2 instead of 1/2. However, we also need to add a constant term to reproduce the numbers of the sequence. We can write a_1 = -1(2)/2 + c = 8. Therefore, c = 9.
So the explict formula is:
a_n = -n(n+1)/2 + 9</span>
Answer:
211
Step-by-step explanation:
As the statement indicates that on each of the 22 work days of the month the employees of the company received a communication and 4642 communications were sent, to be able to determine the number of employees that the company have, you have to divide the number of communications by the number of days:
4642/22= 211
The company has 211 employees.
