Algebra ->  Tutoring on algebra.com -> See tutors' answers!      Log On

 Tutoring Home For Students Tools for Tutors Our Tutors Register Recently Solved
 By Tutor
| By Problem Number |

Tutor:

# Recent problems solved by 'scoop'

 Inequalities/61235: what is 3x-4(5+x)=x+81 solutions Answer 42134 by scoop(27)   on 2006-11-13 18:45:44 (Show Source): You can put this solution on YOUR website!use distribtion to get rid of brackets; 3x-20-4x=x+8 combine like terms -x-20=x+8 get all variables to one side -x-x=8+20 -2x=28 divide both sides by -2 x=-14
 Inequalities/61232: How would you solve the equation 2a-6=-a?1 solutions Answer 42133 by scoop(27)   on 2006-11-13 18:39:53 (Show Source): You can put this solution on YOUR website!2a-6=-a isolate your variable -6=-a-2a -6=-3a divide both sides by -3 a=2 plug in answer and you will see that it works!
 Linear-equations/61199: 4X - y = -3 y = 4x + 31 solutions Answer 42132 by scoop(27)   on 2006-11-13 18:37:18 (Show Source): You can put this solution on YOUR website!you are given what the y variable is, so just plug it in and solve: 4x-(4x+3)=-3 4x-4x-3=-3 0-3=-3 -3=-3 x=-3 y=-9
 Inequalities/61226: what is 3x-4(5+x)=x+81 solutions Answer 42131 by scoop(27)   on 2006-11-13 18:27:41 (Show Source): You can put this solution on YOUR website!use the distribution method 3x-20-4x=x+8 combine like terms 3x-4x-20=x+8 -x-20=x+8 get variables on one side -20=2x+8 -20-8=2x -28=2x divide both sides by 2 x=-14 if you plug -14 in for all of your x variables you will see that it checks
 Equations/56511: This question is from textbook introductory algebra 2=5b+121 solutions Answer 38344 by scoop(27)   on 2006-10-16 09:01:41 (Show Source): You can put this solution on YOUR website!2=5b+12 isolate the b 2-12=5b-12 -10=5b b=-2
 Equations/56405: Please help me solve this equation: 5(2y-1)=3(y-4) Thank you. 1 solutions Answer 38263 by scoop(27)   on 2006-10-15 15:23:15 (Show Source): You can put this solution on YOUR website!5(2y-1)=3(y-4) 10y-5=3y-12 add 5 to both sides 10y=3y-12+5 10y=3y-7 subtract 3y from both sides 7y=-7 y=-1 plug in for variable and you will see that it is correct!
 Linear-systems/56376: solve the system 3x+4y=40 x-2y=01 solutions Answer 38234 by scoop(27)   on 2006-10-15 13:09:00 (Show Source): You can put this solution on YOUR website!3x+4y=40 x-2y=0 I would use the elimination method and get rid of the y variable: 3x+4y=40 (2)x-2y=0 leaving you with 2x-4y=0 then you simply add equations 3x+4y=40 2x-4y=0 5x=40 divide both sides by 5 x=8 to check...substitute 8 in expression for x 3(8)+4y=40 24+4y=40 4y=40-24 4y=16 y=4 24+16=40 8-8=0 you are correct!!!
 Polynomials-and-rational-expressions/56355: Can you help me with solving a rational equation? The problem is: x^2/x+4 + 8x+16/x+4. I could not find any problems like this worked on this site. Thanks.1 solutions Answer 38218 by scoop(27)   on 2006-10-15 11:27:21 (Show Source): You can put this solution on YOUR website!This one is pretty easy, because you already have a common denominator: x^2/(x+4)+8x+16/(X+4) so you simply add your numerators x^2+8x+16 and keep your denominator to get: x^2+8x+16/(x+4), then factor numerator to get: (x+4)(x+4) all over (x+4) cancel out one in the numerator and one in the denominator which leaves you with: (X+4) AS YOUR ANSWER
 Exponents/53803: What does a 0 exponent mean (as in X to the zero power)?1 solutions Answer 36052 by scoop(27)   on 2006-09-27 15:59:11 (Show Source): You can put this solution on YOUR website!ANY NUMBER TO THE 0 POWER IS ALWAYS 1!
 Evaluation_Word_Problems/48629: what is 15 less than k?how would u put it into an equation?1 solutions Answer 36047 by scoop(27)   on 2006-09-27 15:04:41 (Show Source): You can put this solution on YOUR website!you would just write k-15
 Linear-systems/52247: This question is from textbook solve each sytem by graphing. x + y = 6 x - y = 21 solutions Answer 34805 by scoop(27)   on 2006-09-14 15:09:15 (Show Source): You can put this solution on YOUR website!You can use the elimination method since the y's both cancel each other out leaving you with 2x=8 x=4 then substitute the x value into your equation to get y: 4+y=6 -4 on both sides y=2 then substitute both variables for a check your answer is (4,2)
 Equations/51998: tutor please help me solve for 5-(x-6)=4 Travis1 solutions Answer 34801 by scoop(27)   on 2006-09-14 14:57:22 (Show Source): You can put this solution on YOUR website!5-(x-6)=4 5-x+6=4 5-x+6-6=4-6 5-x=-2 -5+5-x=2-5 -x=-3 divide both sides by negative (because x can not be neg.) x=3/2
 Expressions-with-variables/51831: 3x-y=5 2x+y=01 solutions Answer 34608 by scoop(27)   on 2006-09-12 10:47:31 (Show Source): You can put this solution on YOUR website!You can solve this by using the addition method, because you have two like variables ( the negative and positive y cancel out) leaving you with: 5x=5 divide both sides by 5 leaving you with: x=1
 Square-cubic-other-roots/51823: One number if less than 10 times another. If the sum of the number is 36, what are the 2 numbers? 1 solutions Answer 34607 by scoop(27)   on 2006-09-12 10:43:29 (Show Source): You can put this solution on YOUR website!x-(10x)=36 9x=36 x=4 4-10(4)=36 4-40=36 answers are 4 and 40
 Distributive-associative-commutative-properties/26724: Please help me solve this equation: 2=n-(2n+3). I need to find the value of n. The book has the answer in the back for reference but I keep coming up with the wrong answer. This is the solution I got: 2=n-(2n+3) 2=n-2n+3 2=1n+3 -3=1n-3 -1/1=1n/1 n=1 1 solutions Answer 21874 by scoop(27)   on 2006-05-01 08:22:15 (Show Source): You can put this solution on YOUR website!2=n-(2n+3)= 2=n-2n-3(the negative in front of parenthesis, changes all signs) then add 3 to both sides 2+3=n-2n-3+3 5=n-2n 5=-n divide bothe sides by the negative n=-5 If you replace the n with a negative 5 you wll see that this works!!
 Distributive-associative-commutative-properties/27024: how would you write three equivalent expressions for (7+s)+t using the commutative and associative properties?1 solutions Answer 21873 by scoop(27)   on 2006-05-01 08:15:19 (Show Source): You can put this solution on YOUR website!(7+t)+s (t+s)+7 (s+7)+t In addition with the commutative property you can move any number anywhere!
 Distributive-associative-commutative-properties/27089: Please help me solve the problem: (3w + 7)(2w - 5)1 solutions Answer 21872 by scoop(27)   on 2006-05-01 08:09:52 (Show Source): You can put this solution on YOUR website!Use the foil method: (3w+7)(2w-5)= (F) 3w*2w=6w^2 (O) 3w*-5+=-15w (I) 7*2w= 14w (L) 7*-5=-35 so 6w^2-15w+14w-35 combine like terms 6w^2-w-35
 Divisibility_and_Prime_Numbers/16846: What is the divisibility of 126?1 solutions Answer 21641 by scoop(27)   on 2006-04-29 10:37:36 (Show Source): You can put this solution on YOUR website!126= 63 x 2= 9 x 7 x 2= 3 x3 x7 x2= 3^2x7x2
 Signed-numbers/11209: Please help me solve this problem: ((( 3 more than twice a number is 2 ))) I have to write this as an algebraic expression or equation.1 solutions Answer 21639 by scoop(27)   on 2006-04-29 10:15:45 (Show Source): You can put this solution on YOUR website!The number will be x So three more than twice a number is 2x+3=2 then subtract the three from both sides to get like terms 2x=2-3 2x=-1 divide both sides by the 2 to get x by itself x=-1/2 (your answer) to check this answer multiply 2(-1/2) +3 =2 -2/2 +3=2 -1+3=2
 Signed-numbers/13684: possitive and negative is equal what?1 solutions Answer 21637 by scoop(27)   on 2006-04-29 10:10:02 (Show Source): You can put this solution on YOUR website!Add the two numbers and take the sign of the greater
 Signed-numbers/25470: (5)(-3)(9)(0)(-6)(7)1 solutions Answer 21636 by scoop(27)   on 2006-04-29 10:06:19 (Show Source): You can put this solution on YOUR website!Whenever you multiply anything by 0, the answer will always be 0 5*-3=-15 -15*9=-135 -135*0=0 0*-6=0 0*7=0 0 is your answer
 Exponents/34463: x+1=31 solutions Answer 21504 by scoop(27)   on 2006-04-28 15:42:58 (Show Source): You can put this solution on YOUR website!you need to get the x by itself so subtract 1 from both sides you will get x = 2
 Exponents/31296: what is 2 to the power of 01 solutions Answer 21503 by scoop(27)   on 2006-04-28 15:40:53 (Show Source): You can put this solution on YOUR website!Anything to the power of 0 equals 1
 Exponents/34744: Using FOIL, simplify the expression "(3x + 2)(3x - 2)". Show that a particular factoring formula leads to the same answer.1 solutions Answer 21502 by scoop(27)   on 2006-04-28 15:39:11 (Show Source): You can put this solution on YOUR website!(3x+2)(3x-2) Foil 3x*3x , then 3x*-2 then 2*3x, then 2*-2 giving you 9x^2-6x+6x-4 combine 9x^2-4
 Exponents/34982: This question is from textbook 2 what is (-2)(-5) (3)1 solutions Answer 21501 by scoop(27)   on 2006-04-28 15:17:48 (Show Source): You can put this solution on YOUR website!Negative 2 times negative 5 gives you a positive 10, then multiply that by 3 for a positive 30
 Equations/35440: Can you please help me solve this problem? I would greatly appreciate your help! 2x/5 + 27/10 + 4x/5 Thank you!1 solutions Answer 21500 by scoop(27)   on 2006-04-28 15:11:14 (Show Source): You can put this solution on YOUR website!2x/5+27/10+4x/5 First know that you need to find the lcd, which is ten, then multiply each fraction by 10 10(2x/5)+10(27/10)+10(4x/5)= 4x +27 +8x combine like terms 12x+27 simplified 3(4x+9)
 Polynomials-and-rational-expressions/35294: I NEED HELP FACTORING: X^2 - 6X + 51 solutions Answer 21499 by scoop(27)   on 2006-04-28 14:57:43 (Show Source): You can put this solution on YOUR website!Start off by factoring the x^2, knowing that the factors of 6 are either 5,1 or 3,2 (you will use 5,1 because they add up to 6) then you have to play with your signs, but since you need a positive 5, you will use two negative terms. (x-5)(x-1) Then to check yourself Foil: x^2-1x-5x+5= combine like terms: x^2-6x+5