14. maria said the expression -4n+3+9n-4
is equivalent to 4n. what error did maria likely make?

15. write an expression equivalent to x-3y+4.

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp