Alberto pagó el año pasado 350 euros por un servicio de teléfono móvil. Si este año ha pagado 378 euros, ¿qué tanto por ciento ha aumentado en el gasto de teléfono móvil?

the percentage increase is 5.3%

Step-by-step explanation:

The computation of the percentage increase is shown below:

= (Current year - last year) ÷ (last year)

= (378 euros - 359 euros) ÷ (359 euros)

= 19  euros ÷ 359 euros

= 5.3%

hence, the percentage increase is 5.3%

on friday there were 15 birds

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.