# Help with this math question

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My son and I keep getting an answer that does not agree with the Answer Key (unfortunately the answer key to Kinetic Books do not show the work). So here is the Pre-Algebra question:

Kahra is renting a copy machine. Two plans are offered. Plan A has a one time installation fee of \$1920 and 1.5 cent per copy. Plan B has no installation fee, but has 4.5 cent per copy charge. What is the minimum number pages that would have to be copied for Plan A to be less than or equal to plan B?:confused:

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427? I divided \$1920 by 4.5. But math ain't my strong suit.

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1920+.015x = .045x

1920 = .030x

1920/.030 = x

64000 = x

1920+(.015 x 64000) = .045(64000)

2880 = 2880

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I'm getting 64000 pages.

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1920+.015x = .045x

1920 = .030x

1920/.030 = x

64000 = x

1920+(.015 x 64000) = .045(64000)

2880 = 2880

:iagree:

Although you'd set it up as an inequality.

Plan A <= Plan B

Prices are what's shown above.

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My son and I keep getting an answer that does not agree with the Answer Key (unfortunately the answer key to Kinetic Books do not show the work). So here is the Pre-Algebra question:

Kahra is renting a copy machine. Two plans are offered. Plan A has a one time installation fee of \$1920 and 1.5 cent per copy. Plan B has no installation fee, but has 4.5 cent per copy charge. What is the minimum number pages that would have to be copied for Plan A to be less than or equal to plan B?:confused:

Ah, Cleo did it better than I did, so pay no attention to me.

I'd love to be able to find copies for 4.5 cents, btw. :001_smile:

Edited by Susan in KY
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Ah, Cleo did it better than I did, so pay no attention to me.

I'd love to be able to find copies for 4.5 cents, btw. :001_smile:

I bet you were one of those math students (just like me) who said, "What am I going to need Algebra for anyway?"

:tongue_smilie:

Now, we know.......

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Ah, Cleo did it better than I did, so pay no attention to me.

Well, no, not really. I just spouted out an answer without showing my steps. Shame on me. :)

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NicksMama-Zack's Mama too, thanks so much. Yeah, the answer is 64,000.

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