Bastyporciuncula231viz
Answered

A theater has 60 seats in the first row, 68 seats in the second row, 76 seats in the third row, and so on in the same increasing pattern. How many seats are there in the 20th row?​

Sagot :

Rzlkyrnsviz

Answer:

213

Step-by-step explanation:

[tex]\alpha_n= \alpha_1 + (n-1) d\\\alpha_{12}= 60 + (20-1) 8\\\\\alpha _{12}=61+(19) 8\\\alpha _{12}=61+152\\\alpha _{12}= 213[/tex]