Posted by Stacy on Monday, March 14, 2011 at 7:21pm.
We will be happy to critique your work.
1)
Numbers of seats in rows in Theater A:
RA=FA+(n-1)*4
FA=Numbers of seats in first row=30
n-number of row
RA=30+(n-1)*4
first row has 30 seats
second row has:
30+(2-1)*4=30+1*4=30+4=34 seats
third row has:
30+(3-1)*4= 30+2*4=30+8=38 seats
fourth row has:
30+(4-1)*4=30+3*4=30+12=42 seats
2)
Numbers of seats in rows in Theater A:
RA=FA+(n-1)*4
FA=Numbers of seats in first row=30
n-number of row
RA=30+(n-1)*4
first row has 30 seats
second row has:
30+(2-1)*4=30+1*4=30+4=34 seats
third row has:
30+(3-1)*4= 30+2*4=30+8=38 seats
fourth row has:
30+(4-1)*4=30+3*4=30+12=42 seats
fifth row has:
30+(5-1)*4=30+4*4=30+16=46 seats
sixth row has:
30+(6-1)*4=30+5*4=30+20=50 seats
seventh row has:
30+(7-1)*4=30+6*4=30+24=54 seats
eighth row has:
30+(8-1)*4=30+7*4=30+28=58 seats
ninth row has:
30+(9-1)*4=30+8*4=30+32=62 seats
tenth row has:
30+(10-1)*4=30+9*4=30+36=66 seats
Is there a row with exactly 60 seats in it? NO
3)
In Teater B first row has 40 seats,and each row has 4 more seats in it than the previous row has.
In Teater B first row has 30 seats,and each row has 4 more seats in it than the previous row has.
40-30=10
That means that each row in theatre B has 10 seats more then row in Theatre A.
If both Theaters has 25 rows.
Difference between numbers of seats in Theater A and Theater B is:
25*10=250 seats