I need help with 29 through 32

Identify one similarity between china and europe that explains their decisions on wether to explore or conquer lands around the indian ocean

If a system of linear equations has the unique solution (2, −3), then its graph consists of what? parallel lines lines that intersect at a single point identical lines a y-intercept at −3

What property does soil or rock need to be permeable? a.)young b.)old c.)non porous d.)porosity