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

Linear-equations/363435: slope to the perpendicular line if the equation is y=3/8 x+19 1 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+4 1 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 12 1 solutions Answer 258986 by Fombitz(13828)   on 2010-10-28 17:03:41 (Show Source): You can put this solution on YOUR website!

Trigonometry-basics/363130: find the value of: tan 3π/2 1 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 intersection 1 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 intersection 1 solutions Answer 258981 by Fombitz(13828)   on 2010-10-28 16:58:43 (Show Source): You can put this solution on YOUR website!

Expressions-with-variables/363199: simplify 2y-17+3z-5y+z 1 solutions Answer 258980 by Fombitz(13828)   on 2010-10-28 16:57:34 (Show Source): You can put this solution on YOUR website!

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): You can put this solution on YOUR website!

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): You can put this solution on YOUR website!

Trigonometry-basics/363139: evaluate the quadrantal angle: csc π 1 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=0 1 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=0 1 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): You can put this solution on YOUR website!

logarithm/363217: Differentiate... y= log5 (6x) 1 solutions Answer 258965 by Fombitz(13828)   on 2010-10-28 16:35:20 (Show Source): You can put this solution on YOUR website!

Rational-functions/363215: Provide answers in interval notation . s^2 - 2s - 35 < 0 1 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): You can put this solution on YOUR website!

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^-4y 1 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)=60 1 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): You can put this solution on YOUR website!

Trigonometry-basics/363133: using the unit circle, find the value of the trigonometric function: sec 3π/2 1 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/3 1 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