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Algebra Level 1

Back in 1995, Don Ho and Efrem Zimbalist Jr were at an autograph-signing event.

Don Ho signed 15 autographs per minute and made $5 per autograph.

Efrem Zimbalist Jr signed 4 autographs per minute and made $9 per autograph.

If they both signed for 10 minutes, how much more in dollars did Don Ho make than Efrem Zimbalist Jr?


The answer is 390.

Denton Young by Denton Young , 47, USA

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2 solutions

B D
Aug 6, 2019

Don Ho makes 15 * 5$ = $75 per minute and $75 * 10 = $750 for 10 minutes. Efrem Zimbalist makes 4 * $9 = $36 per minute and $36 * 10 = $360 for 10 minutes. 750 - 360 = 390.

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Denton Young
Jun 23, 2015

In 10 minutes, Don Ho signed (10 * 15) = 150 autographs and made (150 * $5) = $750 in total.

In the same 10 minutes, Efrem Zimbalist Jr signed (10 * 4) = 40 autographs and made (40 * $9) = $360 in total.

So Don Ho made $(750 - 360) = $390 more than Efrem Zimbalist Jr.

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