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# Recent problems solved by 'Fombitz'

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 Problems-with-consecutive-odd-even-integers/382879: Use polynomial long division to divide 3x^3 + 8x^2 – 13x – 4 by x^2 + 4x + 1 please help me and show show me the steps 1 solutions Answer 271239 by Fombitz(13828)   on 2010-12-08 08:14:27 (Show Source): You can put this solution on YOUR website!``` 3x - 4 __________________________ x^2 + 4x + 1 | 3x^3 + 8x^2 - 13x - 4 - (3x^3 + 12x^2 + 3x) ------------------------ -4x^2 - 16x - 4 - (-4x^2 - 16x - 4) ----------------- 0 ```
 Linear-equations/382799: m/n+2=t/v (v)1 solutions Answer 271238 by Fombitz(13828)   on 2010-12-08 08:10:33 (Show Source):
 Equations/382878: Factor- 20x+12x^21 solutions Answer 271237 by Fombitz(13828)   on 2010-12-08 08:09:38 (Show Source):
Graphs/382793: Graph this system of inequalities
{9x^2+25y^2<=225
{x^2+4y^2>=16
1 solutions

Answer 271236 by Fombitz(13828)   on 2010-12-08 08:09:13 (Show Source):
You can put this solution on YOUR website!
If you graph , you get an ellipse.
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When you pick a point (0,0) and test the inequality.

The solution region is the area inside of the ellipse.
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 Solved by pluggable solver: Plot Any Inequality Graphing function :

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Similarly if you graph , you also get an ellipse.
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When you pick a point (0,0) and test the inequality.

The solution region is the area outside of the ellipse.
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 Solved by pluggable solver: Plot Any Inequality Graphing function :

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So for the system of equations the solution region would be the area between the two ellipses, outside the smaller one and inside the larger one.
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 test/382796: How to solve system of equations by graphing.1 solutions Answer 271235 by Fombitz(13828)   on 2010-12-08 07:58:56 (Show Source): You can put this solution on YOUR website!Graph the equations and look for points of intersection. Those points are solutions.
 Mixture_Word_Problems/382783: How much pure antifreeze should be added to 3 gallons of a 50% antifreeze solution to produce a solution that is 60% antifreeze? I did a table already containing the total amount at the bottom known as .6 for me but I really don't understand this question. Thanks, Jazlyn1 solutions Answer 271234 by Fombitz(13828)   on 2010-12-08 07:58:08 (Show Source): You can put this solution on YOUR website!Pure antifreeze is a 100% solution. Let A be the amount of pure antifreeze. Look at the concentration equation. gallons
 Polynomials-and-rational-expressions/382810: Please solve. x^(2/3) - x^(1/3) - 12=0 1 solutions Answer 271233 by Fombitz(13828)   on 2010-12-08 07:56:28 (Show Source): You can put this solution on YOUR website! Use a substitution, let , then Two solutions: . . .
 percentage/382876: a painting was bought for \$4000 and sold for 4560. what percent was the profit? (the base is the buying price)...THANKS!!!1 solutions Answer 271232 by Fombitz(13828)   on 2010-12-08 07:53:34 (Show Source):
 Linear-systems/382786: {x^2-3y^2=-1 {2x^2-7y^2=-51 solutions Answer 271231 by Fombitz(13828)   on 2010-12-08 07:52:58 (Show Source): You can put this solution on YOUR website!1. 2. Multipy eq. 1 by -2 and add to eq. 2, Then use either equation to solve for . . . .
 Percentage-and-ratio-word-problems/382875: of a toatal of 718,000 workers,26,925 worked in mines. what was the profit? (the base is the buying price) I TRIED EVERYTHING I REALLY NEED YOUR HELP1 solutions Answer 271230 by Fombitz(13828)   on 2010-12-08 07:48:30 (Show Source): You can put this solution on YOUR website!How is profit related to the total number of workers and the number of workers that are miners???
 Signed-numbers/382874: I am trying to help my daugter with her homework, and I've forgotten the formula for the following type of question: 2/3 of a number + 13 = 711 solutions Answer 271229 by Fombitz(13828)   on 2010-12-08 07:47:31 (Show Source): You can put this solution on YOUR website!Let be the number, Subtract 13 from both sides. Multiply both sides by (3/2).
 Quadratic_Equations/382869: I need help facoring this problem: x-2/x2-9+x+1/x2-x-121 solutions Answer 271228 by Fombitz(13828)   on 2010-12-08 07:45:27 (Show Source): You can put this solution on YOUR website! . . . . Use the common denominator . . . . . .
 Linear-systems/382712: solve 7^2x+5=37 for x1 solutions Answer 271175 by Fombitz(13828)   on 2010-12-07 22:19:47 (Show Source):
 Polynomials-and-rational-expressions/382748: pascal's triangle can be used as a shortcut to expand any binomial (a+b)^n n= 0 1 2 3 4... 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 explain how this triangle works and expand. (2x+1)^6 1 solutions Answer 271174 by Fombitz(13828)   on 2010-12-07 22:16:25 (Show Source): You can put this solution on YOUR website!Do two more rows 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1 So then you have the coefficients, then get the terms, . .
 Functions/382739: Please help me solve this equation: sqrt(3+x)+sqrt(3-x)1 solutions Answer 271173 by Fombitz(13828)   on 2010-12-07 22:10:12 (Show Source): You can put this solution on YOUR website!It's not an equation because there is no "=" sign. Please re-post.
 Functions/382754: Find the domain of the following function and express in interval notation X+7 ------- x^2-491 solutions Answer 271170 by Fombitz(13828)   on 2010-12-07 22:08:25 (Show Source): You can put this solution on YOUR website! The domain is all x except . . . (,) U (,)
 logarithm/382349: 1) solve the equation 4^x-3*2^x-4=0 2)solve the equation log2(x-4)-log2(x+3)=81 solutions Answer 271011 by Fombitz(13828)   on 2010-12-07 15:11:06 (Show Source): You can put this solution on YOUR website!1) No solution. No power of 2 or 4 could ever equal zero. . . 2) Use the quadratic formula to solve for x. Only the positive value is a solution because of the restrictions with the log function.
 Expressions-with-variables/382079: what does X-3y=14 X-2=0? plz show work so i may understand.1 solutions Answer 270881 by Fombitz(13828)   on 2010-12-06 22:14:51 (Show Source): You can put this solution on YOUR website!From eq. 1, From eq. 2, Substitute into eq. 1, . . . (,) is the solution.
 Graphs/382035: Write the equation of the line that is parallel to the graph of y=1/2x+6 and whose y intercept is -2.1 solutions Answer 270880 by Fombitz(13828)   on 2010-12-06 22:11:17 (Show Source): You can put this solution on YOUR website!parallel lines have identical slopes. and . . . . .
 Inequalities/382028: If s>t then is the inequality s±15>t±15 true?1 solutions Answer 270879 by Fombitz(13828)   on 2010-12-06 22:09:00 (Show Source): You can put this solution on YOUR website!Yes, If then and
 Probability-and-statistics/382002: If the probability no one is late for class is 0.45, then the probability at least one person is late is a. 0.45 b. 0.55 c. 0.65 d. 0.751 solutions Answer 270878 by Fombitz(13828)   on 2010-12-06 22:07:44 (Show Source): You can put this solution on YOUR website!P(no one)+P(at least 1)= P(at least 1)=-P(no one) P(at least 1)= P(at least 1)=
 Expressions-with-variables/382001: solve:z=9/13c for c answer:c=13/9c how? Show your work.1 solutions Answer 270877 by Fombitz(13828)   on 2010-12-06 22:06:18 (Show Source): You can put this solution on YOUR website! Multiply both sides by 13. Divide both sides by 9.
 Expressions-with-variables/382016: (-4m^3n^3)^3 = -4m^9n^9 is this correct1 solutions Answer 270876 by Fombitz(13828)   on 2010-12-06 22:04:58 (Show Source): You can put this solution on YOUR website!Almost.
 Linear-equations/382005: what is perpendicular to y = 8x - 1, through (4,10)1 solutions Answer 270874 by Fombitz(13828)   on 2010-12-06 22:03:37 (Show Source): You can put this solution on YOUR website!Perpendicular lines have slopes that are negative reciprocals. . . . Use the point (4,10) to solve for . . . .
 logarithm/382006: log5(2x+8)=log5(2x+2) 1 solutions Answer 270873 by Fombitz(13828)   on 2010-12-06 22:01:02 (Show Source): You can put this solution on YOUR website! There is no solution.
 Expressions-with-variables/382008: 2x+6y=15 4x+6y=15 solve for x and y1 solutions Answer 270871 by Fombitz(13828)   on 2010-12-06 22:00:25 (Show Source): You can put this solution on YOUR website!1. 2. Multiply eq. 1 by (-2) and add to eq. 2, Then from eq. 1,
 logarithm/382043: 2^3-x=3^x1 solutions Answer 270869 by Fombitz(13828)   on 2010-12-06 21:58:06 (Show Source): You can put this solution on YOUR website! or approximately
 Distributive-associative-commutative-properties/382054: (3x+10)(x+7) 1 solutions Answer 270868 by Fombitz(13828)   on 2010-12-06 21:54:35 (Show Source): You can put this solution on YOUR website!Use the FOIL method,
 Angles/381797: Two angles are supplementary. The larger angle is 12° more than twice the measure of the smaller angle. Find the measures of the two angles. (Supplementary angles are two angles whose sum is 180°.) I'm supposed to solve this one by addition?1 solutions Answer 270765 by Fombitz(13828)   on 2010-12-06 16:27:35 (Show Source): You can put this solution on YOUR website! Substitute, degrees Then degrees
 Linear_Equations_And_Systems_Word_Problems/381781: 2/3+5/8+1/2= 1 solutions Answer 270764 by Fombitz(13828)   on 2010-12-06 16:26:17 (Show Source):
 Miscellaneous_Word_Problems/381784: mary has 1500 blocks what is the largest number of blocks she can use to construct a cube 1 solutions Answer 270762 by Fombitz(13828)   on 2010-12-06 16:25:06 (Show Source): You can put this solution on YOUR website!A cube has equal numbers of blocks per side. So then 11 cubes per side would use blocks