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aleksley [76]
3 years ago
6

Walter and Brian each have a CD collection. • The number of CDs in Walter's collection can be represented by x. • The number of

CDs in Brian's collection is 3 times the number in Walter's collection. • The total number of CDs in both collections is 144. What is x, the number of CDs in Walter's collection?
Mathematics
1 answer:
statuscvo [17]3 years ago
3 0

Answer:

Number of CDs in Walter's collection = x = 36

Step-by-step explanation:

x denotes number of CDs in Walter's collection.

Also, the number of CDs in Brian's collection is 3 times the number in Walter's collection.

Number of CDs in Brian's collection =3x

Total number of CDs in both Walter's collection and Brian's collection = 144

x+3x=144\\4x=144\\x=\frac{144}{4}\\ x=36

So,

Number of CDs in Walter's collection = x = 36

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Answer:

Step-by-step explanation:

Let's organise our information :

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Now the trick is to write this expression as a quadratic equation with zero at one side :

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Δ=1²-4*(1/2)*(-4)

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So we have two solutions :

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3 years ago
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9/10

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Answer:


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