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# Recent problems solved by 'Fombitz'

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 Probability-and-statistics/363433: If the regression equation is y^=2-0.4x, what is the value of y^ when x =-3?1 solutions Answer 259122 by Fombitz(13828)   on 2010-10-28 23:06:12 (Show Source):
 Linear-equations/363435: slope to the perpendicular line if the equation is y=3/8 x+191 solutions Answer 259120 by Fombitz(13828)   on 2010-10-28 23:05:19 (Show Source): You can put this solution on YOUR website!Perpendicular lines have slopes that are negative reciprocals.
 Rational-functions/363233: Simplify 1 over x-4 + 1 over x+41 solutions Answer 258987 by Fombitz(13828)   on 2010-10-28 17:06:04 (Show Source): You can put this solution on YOUR website!Use the common denominator,
 Inequalities/363238: 4(k+2) - 3k is less than or equal to 121 solutions Answer 258986 by Fombitz(13828)   on 2010-10-28 17:03:41 (Show Source):
 Trigonometry-basics/363130: find the value of: tan 3π/21 solutions Answer 258984 by Fombitz(13828)   on 2010-10-28 17:01:23 (Show Source): You can put this solution on YOUR website! Undefined.
 Graphs/363201: x+2y=6 Graph the equation and ideentify the y intersection1 solutions Answer 258982 by Fombitz(13828)   on 2010-10-28 17:00:06 (Show Source): You can put this solution on YOUR website! . . .
 Graphs/363202: y=3x-7 Graph the equation and ideentify the y intersection1 solutions Answer 258981 by Fombitz(13828)   on 2010-10-28 16:58:43 (Show Source):
 Expressions-with-variables/363199: simplify 2y-17+3z-5y+z1 solutions Answer 258980 by Fombitz(13828)   on 2010-10-28 16:57:34 (Show Source):
 Angles/363234: Is it possible to find the complement of the supplement of any angle? Is it possible to fine the supplement of the complement of any angle?1 solutions Answer 258979 by Fombitz(13828)   on 2010-10-28 16:56:01 (Show Source): You can put this solution on YOUR website!Yes and yes. If you subtract them, then So, If you know , you can find and . If you know , you can find and . If you know , you can find and .
 Polynomials-and-rational-expressions/363237: describe the end behavior of the polynomial function lim f(x) and lim f (x) X-> ∞ X-> - ∞ f(x)= -4x^2 + 7x^2 - 3 1 solutions Answer 258976 by Fombitz(13828)   on 2010-10-28 16:53:50 (Show Source):
 Mixture_Word_Problems/363211: A chemist wants to make 50 mL of a 17% acid solution by mixing a 13% acid solution and an 18% acid solution. How many milliliters of each solution should the chemist use? 1 solutions Answer 258975 by Fombitz(13828)   on 2010-10-28 16:52:34 (Show Source): You can put this solution on YOUR website!Let A be the amount of 13% solution, B the amount of 18% solution. 1. . . 2. Multiply eq. 1 by (-13) and add to eq. 2, ml Then from eq. 1, ml
 Mixture_Word_Problems/363214: Two hundred ounces of juice that is 75% tomato juice are added to 100 oz of a vegetable juice that is 20% tomato juice. What is the percent concentration of tomato juice in the resulting mixture? (as a fraction)1 solutions Answer 258974 by Fombitz(13828)   on 2010-10-28 16:50:16 (Show Source): You can put this solution on YOUR website!Let X be the resulting concentration, or approximately 56.7%
 Miscellaneous_Word_Problems/363216: I have 0 thousands, 17 tens, 0 hundreds and 10 ones. What number am I?1 solutions Answer 258972 by Fombitz(13828)   on 2010-10-28 16:48:10 (Show Source):
 Trigonometry-basics/363139: evaluate the quadrantal angle: csc π1 solutions Answer 258971 by Fombitz(13828)   on 2010-10-28 16:47:07 (Show Source): You can put this solution on YOUR website! Undefined.
 Quadratic_Equations/363224: Solve 2x^2+8x-12=01 solutions Answer 258970 by Fombitz(13828)   on 2010-10-28 16:45:16 (Show Source): You can put this solution on YOUR website! . . .
 Quadratic-relations-and-conic-sections/363220: Find the center and radius of the circle x^2+y^2-2x+8y+8=01 solutions Answer 258969 by Fombitz(13828)   on 2010-10-28 16:40:48 (Show Source): You can put this solution on YOUR website! Complete the square in x and y, The general equation for a circle centered at (,) with a radius is: Comparing, (,)=(,)
 Inequalities/363223: 4(X+7)-10=6(x-2)+8 and I need the break down of how it is solved. I see examples in my math book but it is not clear to me how to plus or minus the given number on each side.1 solutions Answer 258967 by Fombitz(13828)   on 2010-10-28 16:37:21 (Show Source):
 logarithm/363217: Differentiate... y= log5 (6x)1 solutions Answer 258965 by Fombitz(13828)   on 2010-10-28 16:35:20 (Show Source):
 Rational-functions/363215: Provide answers in interval notation . s^2 - 2s - 35 < 01 solutions Answer 258959 by Fombitz(13828)   on 2010-10-28 16:25:21 (Show Source): You can put this solution on YOUR website! Break up the number line into 3 regions using the critical points of the function. Region 1:(,) Region 2:(,) Region 3:(,) . . . For each region, choose a point in the region (not an endpoint). Test the inequality. If the inequality is satisfied, the region is part of the solution region. . . Region 1: False, Region 1 is not part of the solution region. . . Region 2: True, Region 2 is part of the solution region. . . Region 3: False, Region 3 is not part of the solution region. . . Solution Region:(,) . . . Graphical verification: Look for regions where the function is above the x-axis () . . .
 Polynomials-and-rational-expressions/363096: (-4c^2 + 3c+2)-(9c^2 +2)1 solutions Answer 258955 by Fombitz(13828)   on 2010-10-28 16:19:47 (Show Source):
 Money_Word_Problems/363102: How long will it take a \$700 investment to be worth \$800 if it is continuously compounded at 10% per year?1 solutions Answer 258954 by Fombitz(13828)   on 2010-10-28 16:18:23 (Show Source): You can put this solution on YOUR website! or approximately, years
 Graphs/362847: Use a system of equations to find the parabola of the form y=ax^2+bx+c that goes through the three given points. (4,-54),(-2,-6),(-3,-19) 1 solutions Answer 258950 by Fombitz(13828)   on 2010-10-28 16:13:31 (Show Source): You can put this solution on YOUR website! . . . 1. . . 2. . . 3. Subtract eq. 2 from eq. 1, 4. Subtract eq. 3 from eq. 1, 5. Subtract eq. 5 from eq. 4, From eq. 5, Then from eq. 2,
 Equations/362770: y+8=x^2+x+1. Put the equation into standard form. Find vertex and the x-intercept.1 solutions Answer 258945 by Fombitz(13828)   on 2010-10-28 16:01:47 (Show Source): You can put this solution on YOUR website! . . . . . Vertex:(,) . . X-intercepts:
 Equations/363091: 8u^9*2x^*4y^-8x^-5u^-4y1 solutions Answer 258944 by Fombitz(13828)   on 2010-10-28 15:58:01 (Show Source): You can put this solution on YOUR website!8u^9*2x^*4y^-8x^-5u^-4y <--- You're missing an exponent after 2x. Please re-post.
 Quadratic_Equations/363193: f(x)=-30t^2+120t+0 how would you explain when f(x)=601 solutions Answer 258943 by Fombitz(13828)   on 2010-10-28 15:56:49 (Show Source): You can put this solution on YOUR website! Find t when,
 Expressions-with-variables/363192: 1 solutions Answer 258941 by Fombitz(13828)   on 2010-10-28 15:54:16 (Show Source): You can put this solution on YOUR website!Please re-post.
 Expressions-with-variables/363195: how can you solve equations with variables on each sides.... how can you do in a easy way wich you can understand it 1 solutions Answer 258940 by Fombitz(13828)   on 2010-10-28 15:53:53 (Show Source): You can put this solution on YOUR website!Can you show an example of what you're thinking of? It's easier than having us guess wrong.
 Average/363194: (a+b/xy)/(a/xy)=1 solutions Answer 258939 by Fombitz(13828)   on 2010-10-28 15:53:06 (Show Source):
 Trigonometry-basics/363133: using the unit circle, find the value of the trigonometric function: sec 3π/21 solutions Answer 258938 by Fombitz(13828)   on 2010-10-28 15:51:09 (Show Source): You can put this solution on YOUR website! Undefined.
 Trigonometry-basics/363137: using periodic properties of trigonometric function, find the exact value of the expression: 8π/31 solutions Answer 258931 by Fombitz(13828)   on 2010-10-28 15:25:26 (Show Source): You can put this solution on YOUR website!??
 Triangles/363186: A triangle has a leg of 12 m and a hypotenuse of 13 m. Find the length of the other leg. 1 solutions Answer 258929 by Fombitz(13828)   on 2010-10-28 15:24:24 (Show Source): You can put this solution on YOUR website!Use the Pythagorean theorem, m