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ludmilkaskok [199]
3 years ago
13

A Web 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?
Mathematics
1 answer:
wlad13 [49]3 years ago
8 0

Answer:

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

2.5x + 4.4y = 5427 MB     (1)

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

So

y = 4x        (2)

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

2.5x + 4.4 (4x) = 5427\\\\2.5x +17.6x = 5427\\\\20.1x=5427\\

x = 270\ downloads

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Is (5,15) a solution of the equation y= 3x? (plz answer asap)
sashaice [31]

Answer:

Yes

Step-by-step explanation:

15 = 3(5)

15 = 15

You plug in the point

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3 years ago
The odds against Carl beating his friend in a round of golf are 9:7. Find the probability that Carl will lose?
grandymaker [24]

The ratio 9:7 gives you following statement:

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Then the probability that Carl will lose is

Pr(\text{Carl will lose})=\dfrac{7}{16}.

Answer: Pr(\text{Carl will lose})=\dfrac{7}{16}.


7 0
3 years ago
Complete the point-slope equation of the line through (-8,-8) and (-7,9)
denis23 [38]

Step-by-step explanation:

point slope formula: y-y1=m(x-x1)

m= y2-y1/x2-x1

input numbers

so slope:

m=(9--8)/(-7--8)

(-)×(-)=+

(+)×(-)=(-)

so m=17/1

m=17

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y and 8 are adding so we need to subtract on both sides

y+8-8=17x+136-8

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5 0
2 years ago
Joel needs to buy some blank DVDS and zip disks to back up a large amount of data that has been generated by an accounting firm.
wlad13 [49]

Answer:

D = 4, Z = 24

Step-by-step explanation:

6D+3Z = 96

5D+4Z = 116

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bottom equation = -30D-24Z = -696

Cancel 30D and -30 D

top equation  = 15Z = 480

Bottom equation = -24Z = -696

15Z - 24 Z = 480 - 696

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Z = 216/9

Z = 24

Now that we have the value of Z, we can substitute it in any equation to find D

6D + 3(24) = 96

6D + 72 = 96

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3 years ago
Help me please with an explanation/work, thank you!!
kiruha [24]

Answer:

1. 3

Step-by-step explanation:

8 0
2 years ago
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