Cho tam giác ABC có điểm A(1; -2) , đường cao BH : x - 2y + 3 và cạnh BC : x + y = 0. Viết phương trình cạnh AB, AC

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

12 dolars one is cheaper becasue 3 pairs is 6 means is sock is 2 while the 12 is cheaper