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Anettt [7]
3 years ago
14

It took Jaytree 42 seconds to rip about half a DVD. About what is Jaytree’s “ripping rate” in DVDs per minute?

Mathematics
1 answer:
Shtirlitz [24]3 years ago
3 0
You can solve this problem by using the following rule of three:
 42 s ----> 0.5 DVD
 x ----> 1 DVD
 Clearing x:
 x = (1 / 0.5) * (42)
 x = 84 s (time to complete a DVD)
 Then, we have the following conversion:
 1min = 60s
 So:
 x = (84/60)
 x = 1.4 min
 The rate is then:
 rate = 1 / 1.4 = 0.71 DVD / minute
 Answer:
 Jaytree's "ripping rate" in DVDs per minute is
 0.71 DVD / minute
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murzikaleks [220]

The value of (x-y) is 16

Further explanation:

We have to use the given values to find the value

Given

x+y=4\\and\\x^2-y^2=64

We will use:

x^2-y^2=64

Simplifying by using: x^2-y^2=(x+y)(x-y)

So,

(x+y)(x-y)=64

As we know that x+y=4

Putting the value in equation

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Dividing both sides by 4

\frac{4(x-y)}{4}=\frac{64}{4}\\x-y=16

The value of (x-y) is 16

Keywords: Algebraic formulas, Simplification

Learn more about algebraic expressions at:

  • brainly.com/question/10879401
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