hey guy, so im learning about integers in math . but im stuck on this question that I can't get right . the question is (3 • -1) the dot stands for , or this = I really need help

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

How many lines can be drawn through points j and k? 0 1 2 3

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.