Aweb music store offers two versions of a popular song. the size of the standard version is 2.7 megabytes (mb). the size of the high-quality version is 4.9 mb. yesterday, there were 1440 downloads of the song, for a total download size of 5120 mb. how many downloads of the high-quality version were there?

There were 560 high-quality version downloads of the song yesterday

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Size of the standard version = 2.7 MB

Size of the high-quality version = 4.9 MB

Number of downloads of the song yesterday = 1,440

Download size yesterday = 5,120 MB

2. How many downloads of the high-quality version were there?

For answering the question we will use the following equation:

x = Number of high-quality downloads of the song yesterday

1,440 - x = Number of standard downloads of the song yesterday

Number of high-quality downloads of the song yesterday * Size of the high-quality version + Number of standard downloads of the song yesterday * Size of the standard version = Download size yesterday

Replacing with the real values, we have:

4.9x + (1,440 - x) * 2.7 = 5,120

4.9x + 3,888 -2.7x = 5,120

2.2x = 5,120 - 3,888

2.2x = 1,232

x = 1,232/2.2 = 560

x = 560 ⇒ (1,440 - x) = 880

There were 560 high-quality version downloads of the song yesterday and 880 standard version.

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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answers

rauschg

rauschg · hand

know the answer? add it here!

step-by-step explanation:

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right