Astudent claims that the equation y=7 is not a linear equation because it does not have the form y=mx+b. do you agree or disagree? why?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?