1. The seats at Cabatuan auditorium were arranged for a one-night concerta-cause...

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March 2021 1 11 Report

1. The seats at Cabatuan auditorium were arranged for a one-night concert
a-cause. There are 20 seats at first row, 25 seats at second row, 30 seats a
third row, and so on for ten rows. How many seats are there in the last tout
What is the total number of seats are there in the auditorium? If the price is
ticket is P500, how much will be the total sales for a night if all seats are
taken?

Answers & Comments

berthive

Answer:

$n = 10 \\ d = 5 \\ a_{1} = 20 \\ \\ a_{n} = a_{1} + (n - 1)d \\ a_{10} = 20 + (10 - 1)5 \\ a_{10} = 20 + (9)5 \\ a_{10} = 20 + 45 \\a_{10} = 65 \: \: seats \: in \: the \: last \: row\\ \\ s_{n} = \frac{n}{2} (2( a_{1} ) + (n - 1)d )\\ s_{10} = \frac{10}{2} (2(20) + (10 - 1)5 )\\ s_{10} = 5 (40 + (9)(5) )\\ s_{10} = 5(85)\\s_{10} = 425 \: total \: number \: of \: seats \: in \: the \: auditorium \\ \\ (500)(425) = 212 \: 500 \: total \: sales$

kylexianef HND po ba "{ }" ganto ung ilagay Sa labas ng open at close parentheses

kaizervonversov hmm

jovelynlego59 tama ba ito?

berthive kylexianef opo { } po kaya lang walang ganyan dun sa keyboard ng brainly na ginamit

godwinsenope27 legit po?

berthive yes po

godwinsenope27 SALAMAT PO☺️

godwinsenope27 FINALOW PO KITA

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