The sum of a number, n, and 8 is multiplied by -4, and the result is -12. What is the number. A. N=-5,B. N=1,C. N=5,D. N=11

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

1     sepan

2     encuentren

3     tenga

4     hable

5   parezca

6   llegue

3; 9 is 8 to -4

step-by-step explanation: