Questions on Algebra: Operations with Signed Numbers answered by real tutors!

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 Algebra: Operations with Signed Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 506318: [1/6 + 1/2] / [19/42 / 1/6] = what Click here to see answer by Maths68(1474)

 Question 514349: Which mixed number is equivalent to the improper fraction? 41/7 Click here to see answer by stanbon(57290)

 Question 514338: I am using a sample problem for you to help me with so I can get the concept on how to work the problem. Translate this to a mathematical equation and solve. A football team gained 13 yards on one play, lost 5 yards on another, and gained 18 yards on the last play of the first half. They had already gained 218 yards during the half. What was the total yardage gain for the first half? Click here to see answer by stanbon(57290)

 Question 514736: _ _ _x_ _ =_ _ _ _ using the numbers 1 through 9 only once make this equation true Click here to see answer by Edwin McCravy(8901)

 Question 518888: place one set of parenthesis on the left side of the equation to make it true 32+4-12/2*8-5+12/3+7=13 thanks for any help this is driving me nuts Click here to see answer by sudhanshu_kmr(1152)

 Question 523000: I need help with this problem: 6-8x2÷4+5. This is what i get when i try it: 6-8x2÷4+5 turns into 6-16÷4+5 turns into 6-4+5 turns into 6-9 which is -3 but -3 isn't one of the answers on the worksheet. Click here to see answer by oberobic(2304)

 Question 524328: Evalute: when x = 3, y = 2, and z = 19 Click here to see answer by Earlsdon(6287)

 Question 524327: Evaluate 7[32 - 2(1 + 2)] ÷ 7 + 52 Click here to see answer by lagbens(14)

 Question 528085: Peter makes 2 dollars an hour more than Steve. When Peter works a 7 hour shift and Steve works a 5 hour shift, Steve makes 26 dollars less than Peter. How much do they each make an hour? Click here to see answer by htmentor(789)

 Question 530055: when solving 3x + 6 = 18, why do you add -6 under the 6 which makes 0 and add -6 under the 18, which makes 12? then it turns out to be 3x = 12, and x = 4. The problem I am having is the signs, why do you use the negative 6? Click here to see answer by rfer(12657)

 Question 530401: I am stuck on the answer to this, I know what it is, but how it was solved How did it get to 33 over 12 (33/12) 26 = -7 + 12p Click here to see answer by jim_thompson5910(28545)

 Question 530357: what is +2 X (+4)= what is -7 X (+14)= what is -12 X (+12)= Click here to see answer by jim_thompson5910(28545)

 Question 530666: Can you explain me binary operation in algebra ? Click here to see answer by richard1234(5390)

 Question 531277: Hello, I am having problems solving this equation. Please assist me in learning. :) 7 - 8r + 3 = 6r - 12 + r the lone r on the end, is that 1r and do I add 1r to 6r? I'm confused what do do with that r thats alone Thank you, Steve Click here to see answer by stanbon(57290)

 Question 5962: HAVING DIFFICULTY WITH NEGATIVES PROBLEM: W - (-43.7) = -4.342 WHAT IS W? 48.042 OR 39.358? Click here to see answer by k16andrew(1)

 Question 541888: This operation is tough for me, I think I may know but it would help out greatly if I was shown how it works. Thank you Also if you could show how it is checked Thanks again. Click here to see answer by JBarnum(2044)

 Question 534615: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. Click here to see answer by JBarnum(2044)

 Question 547505: what is the value of the expression 2x2+3xy-4y2 when x=2 and y=-4? Click here to see answer by RiverBaggett(1)
 Question 547505: what is the value of the expression 2x2+3xy-4y2 when x=2 and y=-4? Click here to see answer by mananth(12270)

 Question 549927: write a rule for the nth term of the arithmetic sequence of the followings: 1. d=4, a14=46 2. d=5/3, a8=24 3. d=-6, a12=-4 4. a5=17, a15=77 5. a2=-28, a20=52 6. d=-4.1, a16=48.2 7. a7=34, a18=122 much help would be appreciated with full works please, not just the answer. thank you very much for ur help and happy new year as well as merry christmas! Click here to see answer by prateekagrawal(56)

 Question 550311: order the following from least to greatest. be sure to show all of your work 7/8 5/6 -6 -8 5 Click here to see answer by zoomkaboom4(62)

 Question 550787: Direction: use one of the formulas for special series to find the sum of the series. 42 ∑ 1 i=1 1. 42 is on top of the symbol, i=1 is on bottom and 1 on right side. 2. 5 on top, n on right, n=1 on bottom. the answer is 15 but how? 3. 18 on top, i=1 on bottom, i on right. 4. 20 on top, k on right, k=1 on bottom 5. 6 on top, n^2 on right, n=1 on bottom. 6. 10 on top, i^2 on right, i=1 on bottom 7. 12 on top, i^2 on right, i=1 on bottom 8. 35 on top, k^2 on right, k=1 on bottom again all these problems are shown in this symbol: ∑ thanks for ur help and happy new year! Click here to see answer by solver91311(16877)

 Question 551556: simplify the following quotient of complex numbers into the form a+bi: ( -9+8i)/(1+2i) Click here to see answer by ankor@dixie-net.com(15646)

 Question 551562: Short answer: Raise the quantity in parentheses to the indicated exponent, and simply the resulting express. Express answer with positive exponents. (-16(x^-2)y^3)^2 ----------------- (80x^-2y^3) Actually it is one parentheses around entire equation on both sides not two at the top not two at the bottom it just one parentheses around entire equation. Click here to see answer by fcabanski(874)

 Question 551558: Simplify the following expression expression; express in terms of i. √ -108 Click here to see answer by mananth(12270)

 Question 553046: I am currently tutoring a student at a local middle school. She had this pre-algebra problem from a test that I believe has a syntax error which makes it difficult to solve. However, I have forgotten the rules that would make this a syntax error for me to explain it to her. This is the equation as written: (-2)-(-8)/(6+4x(-4)-(-6))=x I have entered this equation on a spreadsheet program and it will not take the equation as written. It forces the parenthesis in this order: (-2-(-8)/(6+4*(-4)-(-6)))=x Why is the first equation incorrect and what are the steps to solve? Respectfully, Natalie Witte Click here to see answer by solver91311(16877)