Aweb music store offers two versions of a popular song. the size of the standard version is 2.5 megabytes (mb). the size of the high-quality version is 4.7 mb. yesterday, there were 780 downloads of the song, for a total download size of 3006 mb. how many downloads of the standard version were there?

There were 300 standard version of songs downloaded at Web music store.

Step-by-step explanation:

Let the number of standard version of song download be 'x'.

Let the number of high-quality version of song download be 'y'.

Given:

Total songs downloaded = 780

Now we know that;

Total songs downloaded is equal to sum of the number of standard version of song download and the number of high-quality version of song download.

framing in equation form we get;

Also Given:

Size of standard version of song = 2.5 MB

Size of high-quality version of song = 4.7 MB

Total Download size = 3006 MB

Now we know that;

Total Download size is equal to sum of Size of standard version of song multiplied by the number of standard version of song download and Size of high-quality version of song multiplied by the number of high-quality version of song download.

framing in equation form we get;

Now Multiplying equation 1 by 2.5 we get;

Now Subtracting equation 3 from equation 2 we get;

Substituting the value of y in equation 1 we get;

Hence there were 300 standard version of songs downloaded at Web music store.

is there a picture

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!