Which of the following could be rewritten as an addition problem of two integers with different signs? 30 - (-27)
-30 - 27
30 - 27
30 + 27

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x? y? z? , with vertices x? (4, -2), y? (4, -3), and z? (1, -4). the type of transformation that triangle xyz undergoes is a . triangle x? y? z? then undergoes a transformation to form triangle x? y? z? , with vertices x? (4, 2), y? (4, 3), and z? (1, 4). the type of transformation that triangle x? y? z? undergoes is a .

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !

Can random samples and proportional reasoning be used to determine precise information about a population? explain