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

Equations/386475: Simplify. (9+2i) / (5-6i) 1 solutions Answer 273216 by Fombitz(13828)   on 2010-12-15 08:19:13 (Show Source): You can put this solution on YOUR website!

Linear-equations/386473: Find the center and radius of the circle. x^2+y^2+8x-10y+37=0 1 solutions Answer 273215 by Fombitz(13828)   on 2010-12-15 08:16:41 (Show Source): You can put this solution on YOUR website! Complete the square in x and y. . . . Center:(,) Radius:

Trigonometry-basics/386440: 4sin^2x-(4/cscx)+cosx secx=0 1 solutions Answer 273214 by Fombitz(13828)   on 2010-12-15 08:14:55 (Show Source): You can put this solution on YOUR website! Let , One solution: degrees and degrees

Equations/386467: Solve for X. [(x+4)/5]-[(x+2)/3]>1/2 1 solutions Answer 273213 by Fombitz(13828)   on 2010-12-15 08:08:19 (Show Source): You can put this solution on YOUR website! Multiply both sides by .

Probability-and-statistics/386379: a and b take turns cutting a pack of 52 cards and the pack is shuffled after each cut. if a starts and the cards are cut until one cuts a diamond, whet are the respective chances of a and b first cutting a diamond? 1 solutions Answer 273212 by Fombitz(13828)   on 2010-12-15 08:06:30 (Show Source): You can put this solution on YOUR website! Since the cards are shuffled and no cards are removed, A and B have the same probability of cutting a diamond. There are diamonds in a deck of cards.

Human-and-algebraic-language/386375: simplify expression r=118ft/min, t=(x-2)minutes 1 solutions Answer 273211 by Fombitz(13828)   on 2010-12-15 08:04:51 (Show Source): You can put this solution on YOUR website! Do you mean, ft.

Probability-and-statistics/386363: an experiment consist of tossing two ordinary dice and adding the two numbers. determine the probability of obtaining a sum less than or equal to 4. 1 solutions Answer 273210 by Fombitz(13828)   on 2010-12-15 08:03:52 (Show Source): You can put this solution on YOUR website! There are possible outcomes. List the outcomes that sum to or less. (,) (,) (,) (, (,) (,) Only of them sum to or less.

Miscellaneous_Word_Problems/386355: The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the mean of the data. 3.5 1.6 2.4 3.7 4.1 3.9 1.0 3.6 4.2 3.4 3.7 2.2 1.5 4.2 3.4 2.7 0.4 3.7 2.0 3.6 1 solutions Answer 273209 by Fombitz(13828)   on 2010-12-15 08:01:22 (Show Source): You can put this solution on YOUR website! Sum the values. Then divide by the number of values, , ,or rounded up.

Linear_Equations_And_Systems_Word_Problems/386448: which letter represents a function? A.{(2,1),(1,0),(2,3),(-1,-1)} B.{(2,1),(1,0),(0,3),(-1,-1)} C.{(2,1),(1,0),(1,3),(-1,-1)} D.{(2,1),(1,0),(2,3),(-1,-2)} 1 solutions Answer 273207 by Fombitz(13828)   on 2010-12-15 07:58:56 (Show Source): You can put this solution on YOUR website! Only B has a unique y value for each x value, which is required of a function.

Radicals/386009: What is the Sqrt72-sqrt50 1 solutions Answer 272974 by Fombitz(13828)   on 2010-12-14 13:40:24 (Show Source): You can put this solution on YOUR website!

Miscellaneous_Word_Problems/386056: The speed of light is approximately 1.86 x 10^5 miles per second. If the planet Pluto is 3.67 x 10^9 miles from the sun, how long does it take light from the sun to reach Pluto? Express your answer using scientific notation. 1 solutions Answer 272968 by Fombitz(13828)   on 2010-12-14 13:19:28 (Show Source): You can put this solution on YOUR website! Rate*Time=Distance seconds

Probability-and-statistics/386016: you are going to select 2 cards from a standard deck (without replacement). What is the probability that you will select 2 kings? (Round to 4 decimal places). 1 solutions Answer 272967 by Fombitz(13828)   on 2010-12-14 13:17:07 (Show Source): You can put this solution on YOUR website! For the first king, For the second king, So then for two kings,

Radicals/386048: 4t^2/16t 1 solutions Answer 272966 by Fombitz(13828)   on 2010-12-14 13:15:19 (Show Source): You can put this solution on YOUR website!

Polynomials-and-rational-expressions/385306: Factor the expression a^2-6ab+96^2 into a product of binomials. 1 solutions Answer 272696 by Fombitz(13828)   on 2010-12-13 10:50:47 (Show Source): You can put this solution on YOUR website! Is this the answer you expected or are you missing terms in your problem? Should it be instead of ??

Probability-and-statistics/385324: find the probablity of getting a prime number in each of the following cases: a) a number is chosen randomly from the set {1,2,3,4,5,6,7,8,9,10 and 11} b)two dice are rolled and the sum is observed. 1 solutions Answer 272695 by Fombitz(13828)   on 2010-12-13 10:47:38 (Show Source): You can put this solution on YOUR website! The subset of prime numbers is {2,3,5,7,11}. That's five out of eleven. . . . The possible sums are 2 through 12. The primes are 2,3,5,7,11. That's also five out of eleven.

Numbers_Word_Problems/385390: The average of 3 consequetive+integer is 5.what is the differance between 1st and 3rd no. 1 solutions Answer 272694 by Fombitz(13828)   on 2010-12-13 10:44:35 (Show Source): You can put this solution on YOUR website! Let ,, and be the integers. So, the integers are 4,5 and 6. The difference is then,

Proportions/385402: Solve for x: 2x/7 = 4 1 solutions Answer 272693 by Fombitz(13828)   on 2010-12-13 10:42:44 (Show Source): You can put this solution on YOUR website!

Circles/385404: Find the radius of a circle with these three points: (-4,-9),(-8,-9),(-6,-9)and center (-6,-9) 1 solutions Answer 272692 by Fombitz(13828)   on 2010-12-13 10:40:53 (Show Source): You can put this solution on YOUR website! (-6,-9) cannot be a point on the circle and the center. . . . The distance from the center to any point on the circle is equal to the radius. . . . . .

test/385371: 1/p + 1/q = 5/8 Find value of p and q 1 solutions Answer 272690 by Fombitz(13828)   on 2010-12-13 10:36:12 (Show Source): You can put this solution on YOUR website! Choose a value for , then use the equation to calculate the value of , where and .

Exponents-negative-and-fractional/385298: y=1over2x-4 1 solutions Answer 272688 by Fombitz(13828)   on 2010-12-13 10:28:01 (Show Source): You can put this solution on YOUR website! What's the question?

Functions/385397: I don't see why this problem wouldn't be a function can someone please explain it to me? Let “M” be the set of motor vehicle owners who are registered in Ohio. Let “R” be the set of all motor vehicle registration numbers. Is the correspondence between M and R a function? Why, or why not? 1 solutions Answer 272685 by Fombitz(13828)   on 2010-12-13 10:25:01 (Show Source): You can put this solution on YOUR website! No because for a correspondence to be a function there must be a one-to-one correspondence. For each x value, there must be a unique y value. For cars, this means that each owner can only register one car in his or her name. As you know, some people have only one car but many people have multiple cars in their name. So there is not a one-to-one correspondence, so it can't be a function. . . . However, the other way around it would work because each registration number (VIN number) can only have one owner. So R(M) is a function but M(R) is not.

Percentage-and-ratio-word-problems/385398: If $500 is deposited in an account paying 8.6% annual interest, compounded continuously, how long will it take for the account to increase to $825? 1 solutions Answer 272683 by Fombitz(13828)   on 2010-12-13 10:12:43 (Show Source): You can put this solution on YOUR website! years

Exponents/385244: Please Help factor 3r^2-5r-12 Thank you 1 solutions Answer 272571 by Fombitz(13828)   on 2010-12-12 22:54:43 (Show Source): You can put this solution on YOUR website!

Linear-equations/385196: find the slope of the line containing the given pair of points (-4,3) and (3, 3) 1 solutions Answer 272569 by Fombitz(13828)   on 2010-12-12 22:52:32 (Show Source): You can put this solution on YOUR website!

Quadratic-relations-and-conic-sections/385192: Convert 2x^2 + 2y^2 + 6x - 8y + 12 = 0 into center-radius form. I divided by 2 to get a coefficeint of one. then when I tried to complete the square I didn't know what to do with the 3. x^2 + 3x + ___ + y^2 + 4y + 2 = -6 + ____ + 2 1 solutions Answer 272568 by Fombitz(13828)   on 2010-12-12 22:51:41 (Show Source): You can put this solution on YOUR website! Take (1/2) of 3 and square it, add it to both sides. Also, for you should add 4 and not 2 to both sides (again it's (1/2)4 squared).

Linear-equations/385191: find the y - intercept for x+y=1 1 solutions Answer 272567 by Fombitz(13828)   on 2010-12-12 22:49:06 (Show Source): You can put this solution on YOUR website! Set , solve for . . (,)

Radicals/385235: Solve for x: x+4=4√(x+1) I'm not sure how to do this problem. I first subtracted 4 from both sides to get X on the left and after that I am not sure what to do. 1 solutions Answer 272566 by Fombitz(13828)   on 2010-12-12 22:47:45 (Show Source): You can put this solution on YOUR website! No, first step square both sides. Two solutions: . . . .

Subset/385240: Which of the following are subsets of E, where E {2, 4, 6, 8, ...} 1 solutions Answer 272565 by Fombitz(13828)   on 2010-12-12 22:45:16 (Show Source): You can put this solution on YOUR website! There are no choices provided. Please re-post.

Linear_Algebra/385257: Factor. yu + 10y + uw + 10w 1 solutions Answer 272564 by Fombitz(13828)   on 2010-12-12 22:44:45 (Show Source): You can put this solution on YOUR website!

Linear_Algebra/385245: Factor. 49w^2 - 81 1 solutions Answer 272563 by Fombitz(13828)   on 2010-12-12 22:43:54 (Show Source): You can put this solution on YOUR website!

Linear_Algebra/385247: Factor completely. 32u^4 - 2u^4w^4 1 solutions Answer 272562 by Fombitz(13828)   on 2010-12-12 22:43:21 (Show Source): You can put this solution on YOUR website!