Naomi is a songwriter who collects royalties on her songs whenever they are played in
a commercial or a movie. Naomi will earn $20 every time one of her songs is played
in a commercial and she will earn $100 every time one of her songs is played in a
movie. Naomi's songs were played on 3 more commercials than movies, and her total
earnings on the royalties from all commercials and movies was $300. Graphically
solve a system of equations in order to determine the number of commercials, I, and
the number of movies, y, on which Naomi's songs were played.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

40% off the regular price is the correct answer.

step-by-step explanation:

answer: 5

step-by-step explanation:

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32