Mathematics, 30.11.2019 22:31 jaaay10
Acertain theatre is shaped so that the first row has 23 seats and, moving towards the back, each successive row has 2 seats more than the previous row. if the last row contains 81 seats and the total number of seats in the theatre is 1560, how many rows are there?
Answers: 3
rows in the theater.
will form an Arithmetic progression.
,same for three consecutive terms so this an AP.
terms in AP
![S_n={\frac{n}{2}[2a+(n-1)d]}](/tpl/images/0397/6864/04b58.png)
![S_n=\frac{n}{2}[a+l]](/tpl/images/0397/6864/07c77.png)
![1560=\frac{n}{2}[23+81]](/tpl/images/0397/6864/a3260.png)
Another question on Mathematics
Mathematics, 21.06.2019 16:30
Jorge planted flowers in his garden he planted one row of 12 tulips and one row of 36 daisies george's friend kylie has a garden with 75 flowers in it kylie's garden only contains tulips and daisies. is it possible for kylie‘s garden she have the same ratio of tulips to daisies as george's garden?
Answers: 1
Mathematics, 21.06.2019 19:00
Find the equation of a line whose slope is 2/5 and y- intercept is 2.write your answer in the form 1) ax+by+c=02) x/a+y/b=1
Answers: 1
Mathematics, 21.06.2019 19:30
At 6 1/2 cents per pound of string beans how much does 7 pounds cost
Answers: 1
You know the right answer?
Acertain theatre is shaped so that the first row has 23 seats and, moving towards the back, each suc...
Questions
Social Studies, 10.07.2019 08:30
Spanish, 10.07.2019 08:30
Geography, 10.07.2019 08:30
History, 10.07.2019 08:30
History, 10.07.2019 08:30
History, 10.07.2019 08:30
History, 10.07.2019 08:30
History, 10.07.2019 08:30
English, 10.07.2019 08:30
Social Studies, 10.07.2019 08:30
History, 10.07.2019 08:30
Computers and Technology, 10.07.2019 08:30
