Select each expression that is equivalent to 3(n+6) select all that apply

a. 3n+6
b. 3n+18
c. 2(n+6)+n
d. 2(n+6)+(n+6)
e. 2(n+6)+n

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form

How is this equation completed? i cannot find any examples in the book.