Ihave 9 cowry shells if a dozen eggs(12 eggs) cost 2 cowry shells how many dozens can i purchase

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

What is the equation of a line passing through (-6,5) and having a slope of 1/3

Determine the domain and range of the given function. the domain is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}. the range is all real numbers all real numbers greater than or equal to –2{x: x = –2, –1, 0, 1, 2}{y: y = –2, –1, 0, 1, 2}.