What is the missing value in the proportion 4/5=x/30?

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?

Astrid spent $36 on new shoes. this was $12 less than twice what she spent on a new skirt. part a: which equation would solve for how much she spent on the skirt? part b: solve the equation in the workspace provided below. how much did astrid spend on her skirt?

Here is another math questions. i will keep asking different questions. 4^2x=6