Solve these system of linear equations:
5x-y=10}
4x-2y=20}
and:
3x+4y=12}
2x-y=-10}
with steps !

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Landon wrote that 3−2.6=4. which statement about his answer is true?

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3