A6-foot tall man makes a shadow that is 3 1/2 feet long. how tall is a building that makes a 14 7/8 foot shadow? 8.68 feet 1.41 feet 52.06 feet 25.5 feet

6 / 3.5 =  1.7  * 14 7/8  25 .5 d

2x3 – 6x2 – 14x + 24 square centimeters

if i'm wrong i'm sorry : )

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