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# Recent problems solved by 'JBarnum'

Jump to solutions: 0..29 , 30..59 , 60..89 , 90..119 , 120..149 , 150..179 , 180..209 , 210..239 , 240..269 , 270..299 , 300..329 , 330..359 , 360..389 , 390..419 , 420..449 , 450..479 , 480..509 , 510..539 , 540..569 , 570..599 , 600..629 , 630..659 , 660..689 , 690..719 , 720..749 , 750..779 , 780..809 , 810..839 , 840..869 , 870..899 , 900..929 , 930..959 , 960..989 , 990..1019 , 1020..1049 , 1050..1079 , 1080..1109 , 1110..1139 , 1140..1169 , 1170..1199 , 1200..1229 , 1230..1259 , 1260..1289 , 1290..1319 , 1320..1349 , 1350..1379 , 1380..1409 , 1410..1439 , 1440..1469 , 1470..1499 , 1500..1529 , 1530..1559 , 1560..1589 , 1590..1619 , 1620..1649 , 1650..1679 , 1680..1709 , 1710..1739 , 1740..1769 , 1770..1799 , 1800..1829 , 1830..1859 , 1860..1889 , 1890..1919 , 1920..1949 , 1950..1979 , 1980..2009 , 2010..2039 , 2040..2069, >>Next

 Polynomials-and-rational-expressions/308412: 1 solutions Answer 220514 by JBarnum(2044)   on 2010-05-25 16:19:32 (Show Source): You can put this solution on YOUR website! factor out a 2 inside "()" is a perfect square so factoring is easy if u cant come to this solution use the quadratic formula, but this factoring of a square is much faster. the square looks like this: since b=0 in the abc for the quadratic formula then there will be one factor with a "+" and one with a "-"
 Inequalities/308432: 1 solutions Answer 220511 by JBarnum(2044)   on 2010-05-25 16:11:32 (Show Source): You can put this solution on YOUR website!distribute add like terms subtract 4x and 4 from both sides divide by 4
 Sequences-and-series/308438: WHY DIDNT THEY ANSWER MY MATH PROBLEM 1 solutions Answer 220509 by JBarnum(2044)   on 2010-05-25 16:06:49 (Show Source): You can put this solution on YOUR website!well what was the math problem, cant be answered without a problem to be solved
 Linear-equations/308417: x=-2 y=3x-2 what is y? 1 solutions Answer 220508 by JBarnum(2044)   on 2010-05-25 16:06:02 (Show Source): You can put this solution on YOUR website! use substitution for x multiply add
 Problems-with-consecutive-odd-even-integers/308433: The sum of 3 consecutive odd numbers is 39. What is the answer to this problem when putting it into a equation1 solutions Answer 220505 by JBarnum(2044)   on 2010-05-25 15:58:46 (Show Source): You can put this solution on YOUR website!x, x+1, x+2 are the 3 consecutive numbers 12,13,14 are the numbers u are looking for check correct
 test/308193: I need help multiplaing rational expressions the questions is 1 solutions Answer 220346 by JBarnum(2044)   on 2010-05-24 20:24:50 (Show Source): You can put this solution on YOUR website! factor everything u can
 Systems-of-equations/307965: 8x+12y=24 answer and alt ending1 solutions Answer 220319 by JBarnum(2044)   on 2010-05-24 16:59:36 (Show Source): You can put this solution on YOUR website!um still need more info what are you needing to answer, solving for x? or y? or both? finding line on graph? finding slope? please be specific when writing your question.
 Rectangles/307940: a right angle with 24 inches high with a square base 20 inches by 20 inches1 solutions Answer 220318 by JBarnum(2044)   on 2010-05-24 16:56:30 (Show Source): You can put this solution on YOUR website!this isnt a question and if you are talking bases then you are in the wrong section thats tipically pyramids or cylinders something 3D, please specify what you are trying to answer. like area or surface area or volume?
 Functions/308069: For f(x)=2x+6, find f(3) and find x such that f(x)=101 solutions Answer 220316 by JBarnum(2044)   on 2010-05-24 16:48:54 (Show Source): You can put this solution on YOUR website!f(3)=2(3)+6=6+6=12 f(x)=10=2(x)+6 -> 4=2x -> 2=x
 Average/308052: If the mean of seventh values is 35 and six of the values are 36, 48, 69, 48, 32 and 12 find the seventh value.1 solutions Answer 220315 by JBarnum(2044)   on 2010-05-24 16:44:56 (Show Source): You can put this solution on YOUR website! multiply by 7 0 is the seventh value
 Square-cubic-other-roots/308058: please help with this prolbem i want to make sure that i got it all right. thanks 1 solutions Answer 220309 by JBarnum(2044)   on 2010-05-24 16:37:22 (Show Source): You can put this solution on YOUR website! distribute
 Expressions-with-variables/308062: What number is 18% of 324?1 solutions Answer 220306 by JBarnum(2044)   on 2010-05-24 16:34:40 (Show Source): You can put this solution on YOUR website!18%=.18 .18(324)=58.32
 Polynomials-and-rational-expressions/308027: 1 solutions Answer 220305 by JBarnum(2044)   on 2010-05-24 16:33:32 (Show Source): You can put this solution on YOUR website! multiply by a common one on top and bottom multiply accross in all the parts add the numerators on top and bottom with a fraction divided by a fraction u multiply first fraction by reciprical of second fraction multiply across
 Polynomials-and-rational-expressions/308020: a number less 6% of that number equals = 450,000 How would I figure this out? is it? n-.06n=450000 ? if so, how would i figure it out from there?1 solutions Answer 220259 by JBarnum(2044)   on 2010-05-24 14:39:18 (Show Source): You can put this solution on YOUR website!n-.06n=450000 1.00n-.06n=450000 1.00-.06=.94 .94n=450000 divide by .94 n=478723.40
 Numeric_Fractions/308017: 7. What fraction should be added to 3/8 and 5/12 to make the result 1 I'm not sure if I remember the right way to do this, but this is what I tried. 3/8 + 5/12 + a/b = 1 3/8 = 9/24 5/12 = 10/24 19/24 + a/24 = 1 19/24 + 5/24 = 24/24 = 1 a/b = 5/241 solutions Answer 220257 by JBarnum(2044)   on 2010-05-24 14:35:02 (Show Source): You can put this solution on YOUR website!thats correct just had to find the common denominator and then add the 2 fractions then take that numerator and subtract it from the 1 made by the denominator. well done
 Linear-systems/308004: write an equation with points of (0,4) and (7,-4) (I'm not sure where this line of question should go...)1 solutions Answer 220256 by JBarnum(2044)   on 2010-05-24 14:31:12 (Show Source): You can put this solution on YOUR website!its in correct area u need to know the point slope formula and slope intercept formula. point slope is slope intercept (0,4)(7,-4) multiply by 7 this is your line
 Expressions-with-variables/308002: what is the value of x in the equation ? (square root 5x)-12=13 a. 1/125 b. 1/5 c. 25 d. 125 tthanks!1 solutions Answer 220239 by JBarnum(2044)   on 2010-05-24 13:59:26 (Show Source): You can put this solution on YOUR website! if then square both sides divide by 5 Check correct
 Numeric_Fractions/301818: In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,800 words. Using smaller type a page contains 2,400 words. The article is allocated 21 full pages in a magazine. How may pages must be in smaller type?1 solutions Answer 219816 by JBarnum(2044)   on 2010-05-21 20:15:52 (Show Source): You can put this solution on YOUR website!Big type=B Small type=S B=number of big type pages S=number of small type pages B+S=21 , B=21-S 1800B+2400S=48000
 Numeric_Fractions/299515: In order to pass a chapter test a must answer 80% or more of the questions correctly if a chapter test has 25 questions what is the smallest number of questions that the student must answer correctly in order to pass the test? please help me in steps if possible becuase i have others like this to solve, thank you in advance.1 solutions Answer 219814 by JBarnum(2044)   on 2010-05-21 20:03:43 (Show Source): You can put this solution on YOUR website!80%=.8 "of" means multiply 80% of 25 questions =? atleast 20 questions must be answered correctly
 Numeric_Fractions/300113: G/2 + 6 = 12.11 solutions Answer 219813 by JBarnum(2044)   on 2010-05-21 20:00:20 (Show Source): You can put this solution on YOUR website! subtract 6 multiply by 2
 Numeric_Fractions/300199: 7/15+2/5=?1 solutions Answer 219812 by JBarnum(2044)   on 2010-05-21 19:58:13 (Show Source): You can put this solution on YOUR website!15 is LCD because 5*3=15
 Numeric_Fractions/300201: 1 solutions Answer 219811 by JBarnum(2044)   on 2010-05-21 19:56:10 (Show Source): You can put this solution on YOUR website! 4 goes into 12, 6 goes into 12, 12 goes into 12 so 12 is LCD 6*2=12 4*3=12 add
 Numeric_Fractions/300213: I need to subtract 1/6-4/51 solutions Answer 219810 by JBarnum(2044)   on 2010-05-21 19:52:54 (Show Source): You can put this solution on YOUR website!multiply denominator together to get common denominator 5*6=30 5/30-24/30 -19/30
 Numeric_Fractions/300325: ihave a problem here. i need to have the total sum equivalent to 1/8. this should be the total of 4 distinctive fractions. numeric should be 1. it goes like this : 1/w +1/x + 1/y + 1/z = 1/81 solutions Answer 219807 by JBarnum(2044)   on 2010-05-21 19:48:44 (Show Source): You can put this solution on YOUR website!doesnt have to so or
 Numeric_Fractions/300403: what is 5 things that you could call 3/41 solutions Answer 219805 by JBarnum(2044)   on 2010-05-21 19:43:08 (Show Source): You can put this solution on YOUR website!fraction, decimal, number, percent, three quarters 3/4, .75, 75%
 Numeric_Fractions/300559: answer & explanation for x/3 + x/51 solutions Answer 219803 by JBarnum(2044)   on 2010-05-21 19:38:48 (Show Source): You can put this solution on YOUR website! this is finding the Lowest Common Denominator, or just making the denominator the same so u can add the two fractions together. best way is just to multiply the denominators together 3*5=15 so 15 is going to be the denominator. now u multiply by a one that will make the denominator of the fraction = to 15. now add the numerators
 Numeric_Fractions/301007: i need to know 356/100 in lowest term 1 solutions Answer 219801 by JBarnum(2044)   on 2010-05-21 19:33:24 (Show Source): You can put this solution on YOUR website!start with basics divide each by 2 divide by 2 again 25 is only divisible by 1,5,25 none of thos go into 89 evenly so this is ur lowest fraction form
 Numeric_Fractions/303118: express (3x + 1)/(3x+1)(x+5)(2x-1) in partial fractions. Please help! thankyou1 solutions Answer 219800 by JBarnum(2044)   on 2010-05-21 19:29:04 (Show Source): You can put this solution on YOUR website!not quite getting what u mean
 Numeric_Fractions/303363: 2/3 X + 5 = 10 I don't know how to figure this out. Don't know what to do first Also need to know how to subtract 11/12 - 5/9 divided by 2/3 Thanks very much!1 solutions Answer 219797 by JBarnum(2044)   on 2010-05-21 19:24:26 (Show Source): You can put this solution on YOUR website!first thing is to subtract 5 from both sides of = sign with a fraction before X you would want to multiply by its reciprical to both sides find the Lowest Common Denominator for the 2 fractions in the numerator 9*4=36 and 12*3=36 so 36 is the LCD to change the fractions multiply by the common one to get 36 as the denominator multiply across numerator subtract the numerator fractions when dividing by a fracton it is the same as multiplying by the fractions reciprical cross cancel what u can multiply accros
 Numeric_Fractions/304066: y^2-25/by-40 * y-6/y+5 I believe this pro. needs to be mulyiplied and if possible simplify. Thank for helping!!!1 solutions Answer 219755 by JBarnum(2044)   on 2010-05-21 16:33:45 (Show Source): You can put this solution on YOUR website!first thing is to myltiply straight across expand the perfect square thats as reduce as i can get it
 Numeric_Fractions/305439: what is 22x+7-3 divided by four = 14x +32 x 2 divided by four?1 solutions Answer 219754 by JBarnum(2044)   on 2010-05-21 16:17:58 (Show Source): You can put this solution on YOUR website! multiply both sides by 4 simplify subtract 14x subtract 4 Divide by 8 reduce