Find the measure of each indicated angle

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the