A blueprint of a plot of land has a scale of 1 1/2 cm to m. The length of land measures 15 cm on the blueprint. If l represents the length of the actual piece of land, what is l?

l = 82.5m

Step-by-step explanation:

11/2 x 15 = 82.5

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