A cable is 7,745 meters long. What are values of the 7s in the number 7,745?

The values of the 1st 7 is 7 thousand, because it is in the thousands place. the second 7 has a value of 7 hundred, because it is in the hundreds place.

Hope this helps.

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

answer: 20

step-by-step explanation: