Solve the equation.
1. -66 = -9n+ 16 + 4
n = 4
b. n = 10

Step-by-step explanation:

N = 4

Putting value of n

-66 = - 9(4) + 16 +4

-66 = - 36 + 20

-66 = - 16

= - 16 + 66

= 50

N = 10

Putting value of n

-66 = - 9(10) + 16 +4

-66 = - 90 + 20

-66 = - 70

= - 66 + 70

= 4

Given:
year 2000 - 900 skaters per week.

Decrease of 5% per year.

2000 - 900 x 52 weeks = 46,800
2001 - 46,800 x 95% = 44,460
2002 - 44,460 x 95% = 42,237
2003 - 42,237 x 95% = 40,125
2004 - 40,125 x 95% = 38,119
2005 - 38,119 x 95% = 36,213
2006 - 36,213 x 95% = 34,402

34,402 ÷ 52 weeks = 661.5 or  B. 662 SKATERS PER WEEK.