Mr. mcelroy enjoys listening to his mp3 player, which has 2,000 songs in five different genres of music. he took a sample of the number of each type of song it played on two different one-hour sessions when it was set to play a random mix. the results are displayed in the table below. what is a good prediction for the number of rock songs mr. mcelroy has on his mp3 player? listening samples from mr. mcelroy’s mp3 player sample 1 sample 2 country 5 country 3 pop 4 pop 3 classical 3 classical 5 jazz 2 jazz 4 rock 6 rock 5 225 550 1100 1667 mark this and return

The correct number is 550 rock songs.

Step-by-step explanation:

To find this, we start by determining how many songs there were in each trial.

5+4+3+2+6 = 20

3+3+5+4+5 = 20

Next we need to find the average number of rock songs in the trials.

(6+5)/2 = 5.5

Now to find the average percentage of songs, divide the rock songs by overall.

5.5/20 = 27.5%

Now we can multiply that percentage by the total number of songs on the mp3 player.

2000*27.5% = 550 Songs

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

maybe showing the graph would

step-by-step explanation:

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