I need to help Use the linear combination method to solve.

{x+2y=1}
{x−2y=5}

(1,3)
(3,−1)
(2,6)
(2,0)

What is the base of 1/9 to the power of 2

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

Find the missing variable for a parallelogram: a = latex: 32in^2 32 i n 2 h = b = 6.3 in (1in=2.54cm)