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Recent problems solved by 'Fombitz'

Fombitz answered: 13805 problems
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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): You can put this solution on YOUR website!

Equations/382878: Factor- 20x+12x^2 1 solutions Answer 271237 by Fombitz(13828)   on 2010-12-08 08:09:38 (Show Source): You can put this solution on YOUR website!

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. . . . . When you pick a point (0,0) and test the inequality. The solution region is the area inside of the ellipse. . Solved by pluggable solver: Plot Any Inequality Graphing function : . Similarly if you graph , you also get an ellipse. . . When you pick a point (0,0) and test the inequality. The solution region is the area outside of the ellipse. . Solved by pluggable solver: Plot Any Inequality Graphing function : . . . 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. . . . .

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, Jazlyn 1 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): You can put this solution on YOUR website!

Linear-systems/382786: {x^2-3y^2=-1 {2x^2-7y^2=-5 1 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 HELP 1 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 = 71 1 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-12 1 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 x 1 solutions Answer 271175 by Fombitz(13828)   on 2010-12-07 22:19:47 (Show Source): You can put this solution on YOUR website!

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^2-49 1 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)=8 1 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. 0.75 1 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 correct 1 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 y 1 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^x 1 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): You can put this solution on YOUR website!

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