PLZ HELP!!

Nick visits a park. Nick is 5 feet 3 inches tall. He casts a shadow that is 3 feet 6 inches long. A tree nearby casts a shadow that is 160 feet long. How tall is the tree?

x = 2880 inches or 240 feet

Step-by-step explanation:

First convert everything to the same unit. I did feet.

Nick: 63 inches

His Shadow:  42 inches

Tree Shadow:  1920 inches

Set up a ratio:

63/42 = x/1920

42x = 120960

x = 2880 inches or 240 feet

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

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get