Consider the function represented by 9x+3y= 12 with x as the independent variable. how can this function be written using
function notation?
my = -1
f(x) = - 3x+4
fv = - 3y+4

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Answer this question! 30 points and brainliest! only if you know the answer.

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?