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'perpetual motion' is ruled out of the realm of possibility because of which law of thermodynamics?

I need help setting up this problem or atleast if I am on the write track to solving it. The Jurassic Zoo charges $28.00 for each adult admission and $12.00 for each child. The total bill for 454 people from a school trip was $3860.00. How many adults and...

evidence indicates that copper is paramagnetic, but zinc is not. Explain the evidence.

Hi I need some help with this math problem..... x - 3/4= 5/6

There was one student still taking the exam when the bell rang. I need to find simple subject and complete subject. I know that "STUDENT" is the subject

You play a game in which two dice are rolled. If a sum of 7 appears, you win $10. Otherwise you lose $2.00. If you intend to play the game for a long time should you expect to make money, lose money or come out even?

6x2y2 + 3x2y – 4xy2 + 5x2y – 2x2y2

Solve the equation. Round to the nearest tenth if necessary. 1#: 7r - 7 = 2r +18 1. r= -5 2. r= 5 3. r= 2.2 4. r= 1.2 _____________________________________________________ Solve the equation. Round to the nearest tenth if necessary. 2#: 2x + 12 = 18 - x 1...

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Answers to worksheet 63?

I got an A+!!! Thank you Ms. Sue!!