function 1 has an initial value of 7, and for every increase 1 in x, y decreased by 3. the graph represents function 2

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Witch represents the inverse of the function f(x)=1/4x-12