Tutor:

New! Get regular updates about newly solved problems via algebra.com's RSS system.

---

Recent problems solved by 'Fombitz'

Fombitz answered: 13805 problems
Jump to solutions: 0..29 , 30..59 , 60..89 , 90..119 , 120..149 , 150..179 , 180..209 , 210..239 , 240..269 , 270..299 , 300..329 , 330..359 , 360..389 , 390..419 , 420..449 , 450..479 , 480..509 , 510..539 , 540..569 , 570..599 , 600..629 , 630..659 , 660..689 , 690..719 , 720..749 , 750..779 , 780..809 , 810..839 , 840..869 , 870..899 , 900..929 , 930..959 , 960..989 , 990..1019 , 1020..1049 , 1050..1079 , 1080..1109 , 1110..1139 , 1140..1169 , 1170..1199 , 1200..1229 , 1230..1259 , 1260..1289 , 1290..1319 , 1320..1349 , 1350..1379 , 1380..1409 , 1410..1439 , 1440..1469 , 1470..1499 , 1500..1529 , 1530..1559 , 1560..1589 , 1590..1619 , 1620..1649 , 1650..1679 , 1680..1709 , 1710..1739 , 1740..1769 , 1770..1799 , 1800..1829 , 1830..1859 , 1860..1889 , 1890..1919 , 1920..1949 , 1950..1979 , 1980..2009 , 2010..2039 , 2040..2069 , 2070..2099 , 2100..2129 , 2130..2159 , 2160..2189 , 2190..2219 , 2220..2249 , 2250..2279 , 2280..2309 , 2310..2339 , 2340..2369 , 2370..2399 , 2400..2429 , 2430..2459 , 2460..2489 , 2490..2519 , 2520..2549 , 2550..2579 , 2580..2609 , 2610..2639 , 2640..2669 , 2670..2699 , 2700..2729 , 2730..2759 , 2760..2789 , 2790..2819 , 2820..2849 , 2850..2879 , 2880..2909 , 2910..2939 , 2940..2969 , 2970..2999 , 3000..3029 , 3030..3059 , 3060..3089 , 3090..3119 , 3120..3149 , 3150..3179 , 3180..3209 , 3210..3239 , 3240..3269 , 3270..3299 , 3300..3329 , 3330..3359 , 3360..3389 , 3390..3419 , 3420..3449 , 3450..3479 , 3480..3509 , 3510..3539 , 3540..3569 , 3570..3599 , 3600..3629 , 3630..3659 , 3660..3689 , 3690..3719 , 3720..3749 , 3750..3779 , 3780..3809 , 3810..3839 , 3840..3869 , 3870..3899 , 3900..3929 , 3930..3959 , 3960..3989 , 3990..4019 , 4020..4049 , 4050..4079 , 4080..4109 , 4110..4139 , 4140..4169 , 4170..4199 , 4200..4229 , 4230..4259 , 4260..4289 , 4290..4319 , 4320..4349 , 4350..4379 , 4380..4409 , 4410..4439 , 4440..4469 , 4470..4499 , 4500..4529 , 4530..4559 , 4560..4589 , 4590..4619 , 4620..4649 , 4650..4679 , 4680..4709 , 4710..4739 , 4740..4769 , 4770..4799 , 4800..4829 , 4830..4859 , 4860..4889 , 4890..4919 , 4920..4949 , 4950..4979 , 4980..5009 , 5010..5039 , 5040..5069 , 5070..5099 , 5100..5129 , 5130..5159 , 5160..5189 , 5190..5219 , 5220..5249 , 5250..5279 , 5280..5309 , 5310..5339 , 5340..5369 , 5370..5399 , 5400..5429 , 5430..5459 , 5460..5489 , 5490..5519 , 5520..5549 , 5550..5579 , 5580..5609 , 5610..5639 , 5640..5669 , 5670..5699 , 5700..5729 , 5730..5759 , 5760..5789 , 5790..5819 , 5820..5849 , 5850..5879 , 5880..5909 , 5910..5939 , 5940..5969 , 5970..5999 , 6000..6029 , 6030..6059 , 6060..6089 , 6090..6119 , 6120..6149 , 6150..6179 , 6180..6209 , 6210..6239 , 6240..6269 , 6270..6299 , 6300..6329 , 6330..6359 , 6360..6389 , 6390..6419 , 6420..6449 , 6450..6479 , 6480..6509 , 6510..6539 , 6540..6569 , 6570..6599 , 6600..6629 , 6630..6659 , 6660..6689 , 6690..6719 , 6720..6749 , 6750..6779 , 6780..6809 , 6810..6839 , 6840..6869 , 6870..6899 , 6900..6929 , 6930..6959 , 6960..6989 , 6990..7019 , 7020..7049 , 7050..7079 , 7080..7109 , 7110..7139 , 7140..7169 , 7170..7199 , 7200..7229 , 7230..7259 , 7260..7289 , 7290..7319 , 7320..7349 , 7350..7379 , 7380..7409 , 7410..7439 , 7440..7469 , 7470..7499 , 7500..7529 , 7530..7559 , 7560..7589 , 7590..7619 , 7620..7649 , 7650..7679 , 7680..7709 , 7710..7739 , 7740..7769 , 7770..7799 , 7800..7829 , 7830..7859 , 7860..7889 , 7890..7919 , 7920..7949 , 7950..7979 , 7980..8009 , 8010..8039 , 8040..8069 , 8070..8099 , 8100..8129 , 8130..8159 , 8160..8189 , 8190..8219 , 8220..8249 , 8250..8279 , 8280..8309 , 8310..8339 , 8340..8369 , 8370..8399 , 8400..8429 , 8430..8459 , 8460..8489 , 8490..8519 , 8520..8549 , 8550..8579 , 8580..8609 , 8610..8639 , 8640..8669 , 8670..8699 , 8700..8729 , 8730..8759 , 8760..8789 , 8790..8819 , 8820..8849 , 8850..8879 , 8880..8909 , 8910..8939 , 8940..8969 , 8970..8999 , 9000..9029 , 9030..9059 , 9060..9089 , 9090..9119 , 9120..9149 , 9150..9179 , 9180..9209 , 9210..9239 , 9240..9269 , 9270..9299 , 9300..9329 , 9330..9359 , 9360..9389 , 9390..9419 , 9420..9449 , 9450..9479 , 9480..9509 , 9510..9539 , 9540..9569 , 9570..9599 , 9600..9629 , 9630..9659 , 9660..9689 , 9690..9719 , 9720..9749 , 9750..9779 , 9780..9809 , 9810..9839 , 9840..9869 , 9870..9899 , 9900..9929 , 9930..9959 , 9960..9989 , 9990..10019 , 10020..10049 , 10050..10079 , 10080..10109 , 10110..10139 , 10140..10169 , 10170..10199 , 10200..10229 , 10230..10259 , 10260..10289 , 10290..10319 , 10320..10349 , 10350..10379 , 10380..10409 , 10410..10439 , 10440..10469 , 10470..10499 , 10500..10529 , 10530..10559 , 10560..10589 , 10590..10619 , 10620..10649 , 10650..10679 , 10680..10709 , 10710..10739 , 10740..10769 , 10770..10799 , 10800..10829 , 10830..10859 , 10860..10889 , 10890..10919 , 10920..10949 , 10950..10979 , 10980..11009 , 11010..11039 , 11040..11069 , 11070..11099 , 11100..11129 , 11130..11159 , 11160..11189 , 11190..11219 , 11220..11249 , 11250..11279 , 11280..11309 , 11310..11339 , 11340..11369 , 11370..11399 , 11400..11429 , 11430..11459 , 11460..11489 , 11490..11519 , 11520..11549 , 11550..11579 , 11580..11609 , 11610..11639 , 11640..11669 , 11670..11699 , 11700..11729 , 11730..11759 , 11760..11789 , 11790..11819 , 11820..11849 , 11850..11879 , 11880..11909 , 11910..11939 , 11940..11969 , 11970..11999 , 12000..12029 , 12030..12059 , 12060..12089 , 12090..12119 , 12120..12149 , 12150..12179 , 12180..12209 , 12210..12239 , 12240..12269 , 12270..12299 , 12300..12329 , 12330..12359 , 12360..12389 , 12390..12419 , 12420..12449 , 12450..12479 , 12480..12509 , 12510..12539 , 12540..12569 , 12570..12599 , 12600..12629 , 12630..12659 , 12660..12689 , 12690..12719 , 12720..12749 , 12750..12779 , 12780..12809 , 12810..12839 , 12840..12869 , 12870..12899 , 12900..12929 , 12930..12959 , 12960..12989 , 12990..13019 , 13020..13049 , 13050..13079 , 13080..13109 , 13110..13139 , 13140..13169 , 13170..13199 , 13200..13229 , 13230..13259 , 13260..13289 , 13290..13319 , 13320..13349 , 13350..13379 , 13380..13409 , 13410..13439 , 13440..13469 , 13470..13499 , 13500..13529 , 13530..13559 , 13560..13589 , 13590..13619 , 13620..13649 , 13650..13679 , 13680..13709 , 13710..13739 , 13740..13769 , 13770..13799 , 13800..13829, >>Next

Probability-and-statistics/360957: a test consists of 100 true or false questions. If the students guesses on each question, what is the mean number of correct answer 1 solutions Answer 257531 by Fombitz(13828)   on 2010-10-24 20:34:17 (Show Source): You can put this solution on YOUR website! Each answer has a probability of p=0.5. For a binomial distribution, . . . 50 correct answers.

Linear-equations/360973: 5x-6y=-4 ; x=y 1 solutions Answer 257530 by Fombitz(13828)   on 2010-10-24 20:32:05 (Show Source): You can put this solution on YOUR website! 1. 2. Substitute eq. 2 into eq. 1, . .

Triangles/360969: in triangle ABC, angle A=6x+11, Angle B=3x-1, and Angle C=5x+2. Solve for x and find the measure of each interior angle. Also, find the measure of the exterior angle at B. 1 solutions Answer 257529 by Fombitz(13828)   on 2010-10-24 20:30:33 (Show Source): You can put this solution on YOUR website! The sum of the interior angle of a triangle are 180. . . degrees . . degrees . . }degrees . . degrees

Unit_Conversion_Word_Problems/360935: It takes 2 people 24 minutes to feed 18 cats. Working at the same rate, how many minutes should it take 3 people to feed 18 cats? 1 solutions Answer 257528 by Fombitz(13828)   on 2010-10-24 20:24:37 (Show Source): You can put this solution on YOUR website! It take people-minutes to feed 18 cats. minutes

Polynomials-and-rational-expressions/360954: algebra 2 how to factor 2n^2+10=82 1 solutions Answer 257527 by Fombitz(13828)   on 2010-10-24 20:23:28 (Show Source): You can put this solution on YOUR website!

Probability-and-statistics/360983: --------------- QUESTION FOLLOWS -------------------------- How many green elements ae required to make this a legitimate probability distrubtion if there are a total of 50 elements in this sample? X red blue orange brown green P(x) 0.10 0.10 0.18 0.22 1 solutions Answer 257526 by Fombitz(13828)   on 2010-10-24 20:22:08 (Show Source): You can put this solution on YOUR website! To be a legitimate distribution, it needs to sum to 1.0 so find P(G). . . .

Rational-functions/360941: How do I find the range of the function sqrt x(x-20)? 1 solutions Answer 257525 by Fombitz(13828)   on 2010-10-24 20:19:07 (Show Source): You can put this solution on YOUR website! Square root function have values that start at zero (for x=20) and increase to infinity as x increases. Range:[,)

Probability-and-statistics/360939: A set of data has mean 66 and standard deviation 7 find the z-score of the value 32. 1 solutions Answer 257524 by Fombitz(13828)   on 2010-10-24 20:15:48 (Show Source): You can put this solution on YOUR website!

Polynomials-and-rational-expressions/360932: What is the answer to this factor by grouping equation 2xy+3x-8y-12 1 solutions Answer 257523 by Fombitz(13828)   on 2010-10-24 20:14:53 (Show Source): You can put this solution on YOUR website!

Points-lines-and-rays/360925: z is the midpoint of line xy and xy=27 find xz 1 solutions Answer 257521 by Fombitz(13828)   on 2010-10-24 20:12:23 (Show Source): You can put this solution on YOUR website! . . . Substitute,

Mixture_Word_Problems/360921: If I have a 20% acid solution and a 50% acid solution, how many liters of each do I have to mix to get 600 liters of a 30% solution? 1 solutions Answer 257520 by Fombitz(13828)   on 2010-10-24 20:11:07 (Show Source): You can put this solution on YOUR website! Let A be the amount of 20% acid solution, and B the amount of 50% acid solution. 1. . . 2. Multiply eq. 1 by -2 and add to eq. 2, liters Then from eq. 1, liters

Equations/360924: f(x)=1/3(x+7)^2+7 1 solutions Answer 257519 by Fombitz(13828)   on 2010-10-24 20:08:46 (Show Source): You can put this solution on YOUR website! What's the question? . . .

Expressions-with-variables/360980: P = W(R-r)/2R solve for W solve for r 1 solutions Answer 257518 by Fombitz(13828)   on 2010-10-24 20:07:51 (Show Source): You can put this solution on YOUR website! . . . .

Mixture_Word_Problems/360912: how many grams of alcohol must be added to 40 grams of a 15% alcohol solution to obtain a 20% alcohol solution 1 solutions Answer 257517 by Fombitz(13828)   on 2010-10-24 20:05:52 (Show Source): You can put this solution on YOUR website! Let A be the number of grams of 100% alcohol. grams

Quadratic_Equations/360913: How many solutions does y^2=4/5y+1/2 and x^2-2x-11=0 have? 1 solutions Answer 257516 by Fombitz(13828)   on 2010-10-24 20:03:48 (Show Source): You can put this solution on YOUR website! Quadratic equations always have two solutions. . . . . . . . . . .

Quadratic_Equations/360571: Solve this equation by using the quadratic form. 6x^4 + 11x^2 +4 = 0 1 solutions Answer 257306 by Fombitz(13828)   on 2010-10-24 00:59:23 (Show Source): You can put this solution on YOUR website! . . . . . . .

Systems-of-equations/360611: Solve each equation 2(4 - 5h)= 3h^2 1 solutions Answer 257302 by Fombitz(13828)   on 2010-10-24 00:53:30 (Show Source): You can put this solution on YOUR website! Two solutions: . . .

Quadratic_Equations/360547: Solve the equation x^2-16x+15=0 for ALL SOLUTIONS by COMPLETING THE SQUARE and include AT LEAST THE FIRST TWO MIDDLE STEPS. 1 solutions Answer 257301 by Fombitz(13828)   on 2010-10-24 00:51:06 (Show Source): You can put this solution on YOUR website! and

Linear-equations/360604: In problem 25-28 write the equation and sketch the graph of each line with the given the slope and y-intercept. 25 Slope 1/2 and Y-intercept 3 26 Slope 2 and Y-intercept 3 27 Slope -2 and Y-intercept 1/2 28 Slope 2/3 and Y-intercept -1 1 solutions Answer 257300 by Fombitz(13828)   on 2010-10-24 00:48:14 (Show Source): You can put this solution on YOUR website! I'll do one, you can do the rest. Use the slope-intercept form of a line,. Plot the y-intercept, (0,3). . . . . . . Slope equals change in y over change in x. If I move 2 units in the x, then I need to move 1 unit in the y since the slope is . . . Starting from the point (0,3), X: Y: (2,4) is another point on the line. Plot it and then connect the two points with a line, . . . .

Polynomials-and-rational-expressions/360121: how do i find the zeros of the function y=x^3-4x-1 1 solutions Answer 257071 by Fombitz(13828)   on 2010-10-22 19:51:11 (Show Source): You can put this solution on YOUR website! . . . I used Newton's method, with starting value of, , and , and ,

Expressions-with-variables/360126: Write an equation in point-slope form for the line parallel to -18x + 2y = 7 that contains (3, 1) 1 solutions Answer 257070 by Fombitz(13828)   on 2010-10-22 19:46:54 (Show Source): You can put this solution on YOUR website! First find the slope of this equation. . . . Parallel lines have identical slopes. . .

Quadratic_Equations/360104: what is a quadratic equation for the given information. -sqrt2,3sqrt2. 1 solutions Answer 257069 by Fombitz(13828)   on 2010-10-22 19:45:13 (Show Source): You can put this solution on YOUR website! You mean these are the roots and you want the associated quadratic equation?? . . .

Polynomials-and-rational-expressions/360096: Simplify: (x^2 - 4)/(3x-15)/(x+2)/(x-5) 1 solutions Answer 257068 by Fombitz(13828)   on 2010-10-22 19:42:16 (Show Source): You can put this solution on YOUR website!

Square-cubic-other-roots/359985: x^2-6x+8=0 1 solutions Answer 256921 by Fombitz(13828)   on 2010-10-22 08:39:30 (Show Source): You can put this solution on YOUR website! . . . What's your question?

Quadratic_Equations/360001: Why do you factor a quadratic equation before you solve? How do you compute the intercepts of a quadratic function? What is the number of x- and y-intercepts that quadratic functions may have? 1 solutions Answer 256920 by Fombitz(13828)   on 2010-10-22 08:38:09 (Show Source): You can put this solution on YOUR website! Why do you factor a quadratic equation before you solve? ---Sometimes it's faster and easier to solve using factors than other methods. . . . How do you compute the intercepts of a quadratic function? ---To find the x-intercept, set y=0 and solve for x. ---To find the y-intercept, set x=0 and solve for y. . . . What is the number of x- and y-intercepts that quadratic functions may have? ---A quadratic can have 0,1,or 2 x-intercepts (as seen below). . . . . . . ---A quadratic can only have 1 y-intercept (as seen above).

Graphs/359995: graph 1 solutions Answer 256919 by Fombitz(13828)   on 2010-10-22 08:32:05 (Show Source): You can put this solution on YOUR website! That's not a very exciting graph. . . .

test/360044: Hi I need some some with algebra 1 solutions Answer 256918 by Fombitz(13828)   on 2010-10-22 08:30:57 (Show Source): You can put this solution on YOUR website! Post a clear question and someone should be able to help you.

Probability-and-statistics/360067: Construct a scatterplot for the (x, y) values below, and answer the following questions. You do NOT need to submit your scatterplot with your answer; however, show all other work. x y 1 7.0 2 13.0 3 19.0 4 25.0 5 31.0 - What would be the slope of this regression line? - Would the correlation between x and y be positive or negative? - How would you interpret these data in terms of linear regression? 1 solutions Answer 256917 by Fombitz(13828)   on 2010-10-22 08:29:49 (Show Source): You can put this solution on YOUR website! . . . The data exactly fit a straight line. Use two points to calculate the slope. Then use the point-slope form of a line, with any point.

logarithm/360078: Graph 2^X-4 and log (base 2) (x) +4 1 solutions Answer 256916 by Fombitz(13828)   on 2010-10-22 08:23:48 (Show Source): You can put this solution on YOUR website!

Equations/360081: Solve for t. Clear fractions first: 2/3t + 4 = 1/6t 1 solutions Answer 256915 by Fombitz(13828)   on 2010-10-22 08:22:29 (Show Source): You can put this solution on YOUR website! Multiply both sides by 6. Now solve for .

Graphs/359807: Let a and b represent the length of the sides of a right triangle and h the length of the hypotenuse. Find the missing side. a=2, b=10 1 solutions Answer 256863 by Fombitz(13828)   on 2010-10-21 22:34:39 (Show Source): You can put this solution on YOUR website! Use the Pythagorean theorem,