If linear combination is the method used to solve this system of equations, what is the result of the first step?

x+y = 6
x - y = 2

A. x - y=8

B. x + y=8

C. 2x=8

D. 2y=8

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

mxb67

step-by-step explanation:

i believe that the slope of the line is -5

step-by-step explanation:

yes   because as the functions are graphed they eventually will intersect unless otherwise

step-by-step explanation: