3 years ago

Is the relation a function?

Mathematics

2 answers:

UkoKoshka [18]3 years ago

7 0

Yes it is a function. The x value does not repeat.

KonstantinChe [14]3 years ago

6 0

2...5......4444444.....4444445.

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lutik1710 [3]

For this case, the first thing to do is define variables.

We have then:

x: number of nickels
y: number of dimes
z: number of quarters

We write now the system of equations:

$0.05x + 0.1y + 0.25z = 4.10\\y = 2z\\x = y + 5$

Then rewriting the equations we have:

$0.05 (2z + 5) + 0.1 (2z) + 0.25z = 4.1\\0.05 (2z + 5) + 0.1 (2z) + 0.25z = 4.1\\0.1z + 0.25 + 0.2z + 0.25z = 4.1\\0.55z = 4.1-0.25$

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$x = 14 + 5\\x = 19$

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14 dimes

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Step-by-step explanation:

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