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 4.4 mb. yesterday, the high-quality version was downloaded four times as often as the standard version. the total size downloaded for the two versions was 5427 mb. how many downloads of the standard version were there?

270 downloads

Step-by-step explanation:

Call x the number of times the standard quality version was downloaded and call y the number of times the high quality version was downloaded.

So, we know that

MB     (1)

We also know that the high-quality version was downloaded four times as often as the standard version.

So

       (2)

We substitute equation (2) in equation (1) and solve for x.

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.