Tyson and his friends go to ice skating. Tyson must pay an initial fee of $18.30 plus $4.80 per hour. Which equation can be used to find h, the number of hours he can skate, if he pays a total of $37.50?

37.50 -4.80 + 18.30h

37.50 - 18.30 + 4.80 +h

37.50 - (18.30 + 4.80)

37.50 - 18.30 + 4.80h

37.50-18.30+4.80h

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

true !

step-by-step explanation: