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# Recent problems solved by 'Fombitz'

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 Polynomials-and-rational-expressions/359054: Subtract. Simplify if possible 7-x / x-3 - 9x-8 / 3-x please help me 1 solutions Answer 256241 by Fombitz(13828)   on 2010-10-20 09:50:47 (Show Source): You can put this solution on YOUR website! Simplify the numerator for the final answer.
 Exponential-and-logarithmic-functions/359062: Solve for x 1/4=8^9x+41 solutions Answer 256239 by Fombitz(13828)   on 2010-10-20 09:48:52 (Show Source):
 Polynomials-and-rational-expressions/359060: Divide. (x^4-8x^2+12)/(x^2-2)1 solutions Answer 256238 by Fombitz(13828)   on 2010-10-20 09:47:09 (Show Source):
 Linear_Algebra/359057: simplify (x2+16)(x2-16)=?1 solutions Answer 256237 by Fombitz(13828)   on 2010-10-20 09:45:15 (Show Source): You can put this solution on YOUR website!Use the FOIL Method,
 Miscellaneous_Word_Problems/359050: The table below shows the customer rating of five restaurants in the metro city guide to restaurants. The rating scale is from 1 ,the worst ,to 10, the best . which of the five restaurants has the best average rating ? Restaurant food décor service value Del 7 9 4 7 Aqua 8 9 4 6 Le 10 8 3 5 Sushi 7 7 5 6 Metro 9 8 7 7 A metro B le C aqua D sushi1 solutions Answer 256233 by Fombitz(13828)   on 2010-10-20 09:41:16 (Show Source): You can put this solution on YOUR website!Del= . . Aqua= . . Le= . . Sushi= . . Metro= . . . Complete the calculation to get each average. Highest average wins.
 Polynomials-and-rational-expressions/359053: Multiply. (x^3-x^4)(x^3+x^4)1 solutions Answer 256231 by Fombitz(13828)   on 2010-10-20 09:38:35 (Show Source): You can put this solution on YOUR website!Use the FOIL Method,
 Points-lines-and-rays/359051: find the x and y intercepts of each graph y=x^2 -91 solutions Answer 256230 by Fombitz(13828)   on 2010-10-20 09:36:15 (Show Source): You can put this solution on YOUR website! To find the x-intercept, set and solve for . (,) and (,) . . . To find the y-intercept, set and solve for . (,) . . .
 Complex_Numbers/358805: 1 / x+1 + 2x / x2(squared)-1 - 1 / x-11 solutions Answer 256228 by Fombitz(13828)   on 2010-10-20 09:33:40 (Show Source): You can put this solution on YOUR website!Find a common denominator,
 Complex_Numbers/358802: how would yu solv a quadratic equation for x^2-4x+6=0 and for x^2+1=01 solutions Answer 256227 by Fombitz(13828)   on 2010-10-20 09:29:30 (Show Source): You can put this solution on YOUR website!Use the quadratic formula, . . . where . . . Now follow the same procedure for the second equation.
 Probability-and-statistics/359044: compute the mean, mode, range, standard deviation and variance from the following set of scores: 145, 210, 300, 178, 110, 237, 155, 187, 204, 205, 205, 287, 256, 2001 solutions Answer 256224 by Fombitz(13828)   on 2010-10-20 09:24:30 (Show Source): You can put this solution on YOUR website!Where are you having a problem?
 Sequences-and-series/359043: I TRIED THIS (p^2-Q^2)/PQ = ((P-Q)(P+Q))/pq so [(3*2)-(5*4)][(3*2)+(5*4)]/(3*2)(5*4) it gives -91/301 solutions Answer 256223 by Fombitz(13828)   on 2010-10-20 09:23:55 (Show Source): You can put this solution on YOUR website!What are you trying to solve for? . . . False, so the original equation is not true.
 Polynomials-and-rational-expressions/359045: -4x^2+10x-41 solutions Answer 256221 by Fombitz(13828)   on 2010-10-20 09:20:08 (Show Source): You can put this solution on YOUR website! . . . What's the question?
 Rate-of-work-word-problems/359042: I am not sure how to begin setting this equation up. I know that it requires the d=r*t formula but what goes where and how do I solve it? Filling a tank. A water tank has an inlet pipe and a drain pipe. A full tank can be emptied in 30 minutes if the drain is opened and an empty tank can be filled in 45 minutes with the inlet pipe opened. If both pipes are accidentally opened when the tank is full, then how long will it take to empty the tank?1 solutions Answer 256220 by Fombitz(13828)   on 2010-10-20 09:18:00 (Show Source): You can put this solution on YOUR website!Rate*Time=Volume . . . Let the pool volume be . Calculate the fill rate, Calculate the drain rate, Calculate the time when both valves are open, Substituting, minutes
 Travel_Word_Problems/359041: if you are traveling 330 miles and going 60 mph one way and comming back you are going 40 mph, what is your average speed of velocity?1 solutions Answer 256219 by Fombitz(13828)   on 2010-10-20 09:14:05 (Show Source): You can put this solution on YOUR website!Calculate the time it takes both ways. . . Rate*Time=Distance . . hrs hrs . . Average speed is total distance divided by total time, mph
 Miscellaneous_Word_Problems/358989: A Math quiz has 25 questions. A correct answer earns 8 points, and a wrong one costs 3 points. Jess scores 110 points. How many questions does Jess answer?1 solutions Answer 256217 by Fombitz(13828)   on 2010-10-20 09:10:05 (Show Source): You can put this solution on YOUR website!Let R be the number of right answers, W for wrong answers. 1. 2. Multiply eq. 1 by 3 and add to eq. 2 to eliminate W. Something is wrong with the problem setup since 11 is not a factor of 185, you won't get an integer answer for as required. . . . 17 right, 8 wrong would give Jess 112 points. 16 right, 9 wrong would give Jess 101 points.
 Equations/359026: 12a^3-9a^2+4a-31 solutions Answer 256214 by Fombitz(13828)   on 2010-10-20 09:05:34 (Show Source): You can put this solution on YOUR website! . . . What's the question??
 test/359037: Solve the following system by the substitution method. 7x - y= -1 y= 14x+51 solutions Answer 256213 by Fombitz(13828)   on 2010-10-20 09:04:08 (Show Source): You can put this solution on YOUR website!1. 2. Substitute eq. 2 into eq. 1, Then from eq. 2,
 Quadratic_Equations/359025: Solve 1) The solution set is???? "use at least one inequality or compund inequality to express your answer" Please help me1 solutions Answer 256210 by Fombitz(13828)   on 2010-10-20 09:00:27 (Show Source): You can put this solution on YOUR website! Break up the number line into 4 regions using the critical points of the function. Region 1:(,) Region 2:(,) Region 3:(,) Region 4:(,) . . . 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. . . Region 4: True, Region 4 is part of the solution region. . . Solution Region: (,) U (,) or () and () . . . Graphical verification: Look for regions where the function is above the x-axis () . . .
 Exponents/359032: Multiply and simplify. Assume variables represent nonzero real numbers. x^17 * x^0 please help me 1 solutions Answer 256205 by Fombitz(13828)   on 2010-10-20 08:53:07 (Show Source): You can put this solution on YOUR website!Use the law of exponents, when you multiply, exponents add.
 Probability-and-statistics/359027: Could someone explain this to me because the book was no help. The random variable x has the following probability distribution: x 1 2 3 4 5 ___________________________________________________ P(x) 0.6 0.1 0.1 0.1 0.1 a.) Find the mean and standard deviation of x. b). What is the probability that x is between mean - standard deviation and mean + standard deviation? 1 solutions Answer 256204 by Fombitz(13828)   on 2010-10-20 08:52:10 (Show Source): You can put this solution on YOUR website! is the mean. . . . Calculate the variance first, then .
 Square-cubic-other-roots/358795: x^2 + y^2 = 2 xy = -1 what is x^3 + y^3? Show the steps1 solutions Answer 256202 by Fombitz(13828)   on 2010-10-20 08:46:47 (Show Source): You can put this solution on YOUR website! . . . . . .
 Quadratic_Equations/359024: For the following equation, state the value of the discriminant and then describe the nature of the solutions. 1) what is the value of the discriminant??? 2) Does the equation have one real solution, two real solutions, or two imaginary solutions??? Really lost please help me 1 solutions Answer 256201 by Fombitz(13828)   on 2010-10-20 08:40:13 (Show Source): You can put this solution on YOUR website! . . . . . . . . . . . . If , you have two real roots. If , you have one real root. If , you have two complex roots.
 Geometry_Word_Problems/359010: Please help me solve this equation: x^4+x-3= 0 Find the approximate solutions to the equation.1 solutions Answer 256200 by Fombitz(13828)   on 2010-10-20 08:36:11 (Show Source): You can put this solution on YOUR website! . . . . . . I used Newton's method to get
 real-numbers/359020: Convert 3002 six to base ten.1 solutions Answer 256198 by Fombitz(13828)   on 2010-10-20 08:32:11 (Show Source):
 real-numbers/359019: convert 317 eight to base ten.1 solutions Answer 256197 by Fombitz(13828)   on 2010-10-20 08:30:59 (Show Source):
 Rational-functions/358803: Given the following 3 points, find the particular equation. Graph the parabola. Label the axis of symmetry, vertex, y-intercept and its symmetric partner, and the x-intercepts. (3,138) (10, 292) (15, 282)1 solutions Answer 256196 by Fombitz(13828)   on 2010-10-20 08:28:19 (Show Source): You can put this solution on YOUR website! . . . 1. . . 2. . . 3. Subtract eq. 1 from eq. 2 to eliminate , 4. Subtract eq. 1 from eq. 3 to eliminate , 5. Subtract eq. 4 from eq. 5 to eliminate Then, Then, . . . . Convert to vertex form, , by completing the square. The vertex is (,). . . The vertex lies on the axis of symmetry . . . The y-intercept is, Its symmetric partner would be (,) . . The x-intercepts are, . . .
 Polynomials-and-rational-expressions/359015: x/(x+2)=6/(x+5) Solve Rational Expression1 solutions Answer 256191 by Fombitz(13828)   on 2010-10-20 08:08:51 (Show Source): You can put this solution on YOUR website! Two solutions: . . .
 Angles/358801: Find angle Y if angle Y is six more than three times its complement. 1 solutions Answer 256190 by Fombitz(13828)   on 2010-10-20 08:07:16 (Show Source): You can put this solution on YOUR website!By definition, . . Substitute, degrees Then, degrees
 test/358798: Factor the polynomial: 9xsquared-251 solutions Answer 256189 by Fombitz(13828)   on 2010-10-20 08:05:35 (Show Source): You can put this solution on YOUR website!It's the difference of two squares.
 Graphs/358982: find the slope and y intercept of f(x)= -6 -41 solutions Answer 256188 by Fombitz(13828)   on 2010-10-20 08:04:58 (Show Source): You can put this solution on YOUR website!Are you sure f(x) is correct? . . .