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 Algebra Pre-Algebra and Basic Algebra Math Forum

October 2nd, 2009, 03:15 PM   #1
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Joined: Aug 2009

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Check my work

Could you check my work and see if im corect on the following? if you could help on some i have not yet answered that would be great, i understand this alot more then geometry when getting help
Attached Images 1.jpg (214.6 KB, 95 views) 2.jpg (224.7 KB, 95 views) 3 001.jpg (185.3 KB, 95 views) 4.jpg (147.2 KB, 95 views) October 2nd, 2009, 08:09 PM #2 Global Moderator   Joined: Dec 2006 Posts: 21,036 Thanks: 2274 It's unclear how you can "show your work" for true/false questions. Questions 1 - 4, 11 - 13, 21 - 28, 30, 36, and 43 - 45 are answered correctly. 5. Expressions 6. False 7. True 8. False 9. True 14. Incorrect: instead, 3rd line should be 25 - 14 and so the final answer should be 11. 15. Incorrect: as in 14, do both multiplications first, then the subtraction. Your final step is also incorrect. 16. Incorrect: the exponentiation should be done first, then the division, and last the subtraction. 17. Incorrect: do the exponentiation, then the multiplication, then the subtraction, then the addition; finally, the division. 18. Incorrect: 9� = 81, not 18. 19. Incorrect: do the exponentiation first, then the multiplications in the numerator, then the subtractions, then the multiplication, then the division. 20. Incomplete: there are two questions and you answered the second correctly after ignoring the first. (Do questions 15 - 20 again, showing your improved work. Try to find out about order of operations first.) 29. -(-11) = 11 31. -17 32. -3 + (-5) + 9 = -3 - 5 + 9 = -8 + 9 = 1 (this is mainly working from left to right) 33. Incorrect: evaluate -8 - 9 from left to right to get -17. 34. The answer is -48. Can you now see why? 35. Your final answer of 1 is correct, but your working is either misleading or incorrect. 37. Incorrect: the answer should be 9. 38. Incorrect: x - 2y = -6 - (-6) = 0. 39 - 42. At least make an attempt at these. 46. Continue by subtracting 2x from each side. October 4th, 2009, 05:36 PM   #3
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Re:

Quote:

Thanks bro! Im starting to understand the order of operations... Thanks so much for the help! i understood everything! Tags check, work Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Shamieh Calculus 1 October 23rd, 2013 11:30 PM Shamieh Algebra 5 July 8th, 2013 08:19 PM Shamieh Algebra 7 June 13th, 2013 05:32 PM livestrong136 Calculus 0 May 21st, 2012 12:13 PM rabbit Algebra 2 February 18th, 2012 12:15 AM

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