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3 years ago

Sam is buying music online. He can download 48 songs in 3 minutes. How many minutes will it take to download 128 songs?

Mathematics

2 answers:

Natali5045456 [20]3 years ago

4 0

Answer:

8 minutes

Step-by-step explanation:

48/3 = 16

That means he can download 16 songs in 1 minute.

128/16 = 8

This means he takes 8 minutes to download 128 songs.

katen-ka-za [31]3 years ago

3 0

8 minutes because 48/3 is 16
so 128/16 is 8
and 128/48 is 2.6
3x2.6 is 8

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Problem 1

Domain = $-3 < x \le 3$ , interval notation (-3, 3]
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Domain = $x \ge -2$ , interval notation $[-2, \infty)$
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Explanations:

The left most point is when x = -3, and we are not including this value due to the open hole. The other endpoint is included because it is a filled in circle. The domain is therefore $-3 < x \le 3$ which in interval notation is (-3, 3]. We have the curved parenthesis meaning "exclude endpoint" and the square bracket says "include endpoint". The range is a similar story but we're looking at the smallest and largest y values. Though be careful about which endpoint is open/closed. We have a function because it passes the vertical line test.
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