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

Trigonometry-basics/388142: h(x)=2x^4-7x^3+4x^2+7x-6 1 solutions Answer 274508 by Fombitz(13828)   on 2010-12-21 07:45:19 (Show Source): You can put this solution on YOUR website! What's the question?

Linear-systems/388139: What are the solutions for x,y, and z in the following equations: x-y+9z=-27 2x-4y-z=-1 3x=6y-3z=27 1 solutions Answer 274507 by Fombitz(13828)   on 2010-12-21 07:44:40 (Show Source): You can put this solution on YOUR website! [A]= [x]= [b]= . . [A][x]=[b] [x]=[A]inv[b] . . Using matrix inversion, [x]=

Functions/388130: Can you please help me solve the formula for specified variables? A: B=2 over 5(A-11) Thank you 1 solutions Answer 274506 by Fombitz(13828)   on 2010-12-21 07:42:15 (Show Source): You can put this solution on YOUR website! . . . . . . . .

Linear_Equations_And_Systems_Word_Problems/388214: Solve the system of linear equations using the Elimination Method. 5x-3y=6 7x+2y=-35 1 solutions Answer 274505 by Fombitz(13828)   on 2010-12-21 07:36:10 (Show Source): You can put this solution on YOUR website! 1. 2. Muliply eq. 1 be 2 and eq. 2 by 3 and add them. Then use either equation to solve for y.

Probability-and-statistics/388225: The probability of machine failure in one working day is equal to 0.01. What is the probability that the machine will work without failure for 5 days in a row. 1 solutions Answer 274504 by Fombitz(13828)   on 2010-12-21 07:33:58 (Show Source): You can put this solution on YOUR website!

Functions/387819: Find the value of the constants A, B, C and D in the following identity: . 1 solutions Answer 274394 by Fombitz(13828)   on 2010-12-20 14:47:05 (Show Source): You can put this solution on YOUR website! Compare terms, Then, Then, Then,

Equations/387790: use the equations from part a and part b as a system of equation, use the substitution method to determine how many of each floor plan is avaialble x + y = 56 x + 3y = 56 describe steps 1 solutions Answer 274391 by Fombitz(13828)   on 2010-12-20 14:41:03 (Show Source): You can put this solution on YOUR website! 1. 2. You can re-write eq. 2, Substitute, Then from eq. 1,

Trigonometry-basics/388061: A plane flies 500 kilometers with a bearing of N 44 degrees W from B to C. The plane then flies 720 KM from C to A. Find the bearing of the flight from C to A. Here is a picture of the diagram http://i763.photobucket.com/albums/xx275/trinhkieu888/9-1.jpg thanks for the help! 1 solutions Answer 274387 by Fombitz(13828)   on 2010-12-20 14:19:00 (Show Source): You can put this solution on YOUR website! Convert both displacements to x,y coordinates. Positive x is East. Positive y is North. Angle is measured CCW from x-axis. . . . =(,) =(,) where . . . . . . . . . =(,) =(,) . . =(,) =(,) . . = =(,) =(,) . . . The plane is 970 km from the starting point due west.

Miscellaneous_Word_Problems/387877: Estimate each of the following indicating if the actual answer is greater than or less than the estimate: A) 29/15 + 198/199 B) 5 12/13 + 2 9/10 + 19/20 C) 10 4/9 - 5 1/2 + 99/100 1 solutions Answer 274384 by Fombitz(13828)   on 2010-12-20 13:58:58 (Show Source): You can put this solution on YOUR website! . . . . . .

Money_Word_Problems/388038: A man received 7 per cent interest on a loan of $800 for 1 year. How much interest did he receive? 1 solutions Answer 274382 by Fombitz(13828)   on 2010-12-20 13:53:54 (Show Source): You can put this solution on YOUR website! . . . He received $56.

Rational-functions/388058: -2x -8/x^2 +2x-8 1 solutions Answer 274381 by Fombitz(13828)   on 2010-12-20 13:52:23 (Show Source): You can put this solution on YOUR website!

Miscellaneous_Word_Problems/388059: Could someone help me. I do not understand how to work this out. Please help! Jina drove 345 miles using 13 gallons of gas. At this rate, how many gallons of gas would she need to drive 276 miles? Thank you so much! 1 solutions Answer 274380 by Fombitz(13828)   on 2010-12-20 13:51:15 (Show Source): You can put this solution on YOUR website! Set up a proportion.

Graphs/388060: Find the x-intercept of the graph of the equation: 4x + y = 3 1 solutions Answer 274378 by Fombitz(13828)   on 2010-12-20 13:49:42 (Show Source): You can put this solution on YOUR website! Set solve for . . . . (,)

Numeric_Fractions/387852: solve y+1=-6/7(x+7) 1 solutions Answer 274377 by Fombitz(13828)   on 2010-12-20 13:48:19 (Show Source): You can put this solution on YOUR website! Solve how?? It's the equation of a line in point-slope form. . . .

Probability-and-statistics/388055: A restaurant owner has researched his daily sales over the past year and found the mean daily sales to be $850, with a standard deviation of $325. Based upon the restaurant owner's analysis: a. what percent of daily sales are less than $600? b. what percent of daily sales are between $700 and $1000? c. what percent of sales are between $1000 and $1200 d. what amount of sales separates the top 10 percent from the lower 90 percent? Any hlep will be greatly appreciated... I will do the $5 donation if this can be completed by today at 7CST. Thank you in advance 1 solutions Answer 274375 by Fombitz(13828)   on 2010-12-20 13:45:06 (Show Source): You can put this solution on YOUR website! Find the z scores. a) Now find . . . b) . . . c) . . . d) Working backwards, find the z score that give Now find the x value that gives you that z score. Now solve for .

Radicals/387787: find the inverse. f(x)=sqrt(x-7) 1 solutions Answer 274374 by Fombitz(13828)   on 2010-12-20 13:36:51 (Show Source): You can put this solution on YOUR website! Interchange x and y and solve for y.

Radicals/387785: f(x)=sqrt(x-3) 1 solutions Answer 274373 by Fombitz(13828)   on 2010-12-20 13:35:40 (Show Source): You can put this solution on YOUR website! . . . What's the question?

Graphs/387757: graph the inequality on a plane y>-2x+3 1 solutions Answer 274371 by Fombitz(13828)   on 2010-12-20 13:34:18 (Show Source): You can put this solution on YOUR website! First graph the line, . . . . . . Now choose a point not on the line. (,) is a convenient choice. Test the inequality. If the inequality is satisfied, shade the region containing (,). If not, shade the region that does not contain (,). False, shade the region not containing (,) . . . Solved by pluggable solver: Plot Any Inequality Graphing function :

Polynomials-and-rational-expressions/388045: Solve the following equation for w: 1/w + 7 = -4 1 solutions Answer 274369 by Fombitz(13828)   on 2010-12-20 13:25:16 (Show Source): You can put this solution on YOUR website!

Circles/388036: find the radius of the circle by using this equation: 3x^2+3y^2+42x+42y+186=0. 1 solutions Answer 274351 by Fombitz(13828)   on 2010-12-20 11:05:25 (Show Source): You can put this solution on YOUR website! Complete the square in and . . . .

Points-lines-and-rays/387783: Determine whether WX and YZ are parallel, perpendicular , or neither W(4,3) X(7,-1) Y (5,5) Z(7,3) 1 solutions Answer 274350 by Fombitz(13828)   on 2010-12-20 11:02:57 (Show Source): You can put this solution on YOUR website! Easiest way is to draw them out. Now look at the slope of the two lines. . . .

Polynomials-and-rational-expressions/387746: Solve by adding and simplifying: 2v/v^2-1+v/v-1 1 solutions Answer 274349 by Fombitz(13828)   on 2010-12-20 10:58:10 (Show Source): You can put this solution on YOUR website!

Rectangles/388028: A rectangle has a perimeter of 120 feet. The width is 3 times the length. What is the length of the rectangle? 1 solutions Answer 274348 by Fombitz(13828)   on 2010-12-20 10:54:46 (Show Source): You can put this solution on YOUR website! Then, Substitute, ft Then, ft

Rectangles/388035: if 2/4 of a rectangle is 120 what is the other to angles thanks :)XD 1 solutions Answer 274347 by Fombitz(13828)   on 2010-12-20 10:53:02 (Show Source): You can put this solution on YOUR website! What does "2/4" mean?

Circles/388034: Find the center of the circle using these three points: (-14,-1),(-8,5),(-2,-1). 1 solutions Answer 274346 by Fombitz(13828)   on 2010-12-20 10:52:15 (Show Source): You can put this solution on YOUR website!

testmodule/388033: A box whose weight is 182kg is drawn with constant speed 21m along a horizontal concrete floor. the kinetic friction between the box and the floor is 0.58. Calculate the work done when the box is drawn with horizontal force. ( g = 9.81 m/s^2 ) 1 solutions Answer 274345 by Fombitz(13828)   on 2010-12-20 10:48:54 (Show Source): You can put this solution on YOUR website! Calculate the friction force, Newtons Then Joules

Age_Word_Problems/388031: Four years ago, Lisa was twice as old as John. Four years from now, John will be three quarters of Lisa's age. How old is Lisa Now? 1 solutions Answer 274344 by Fombitz(13828)   on 2010-12-20 10:45:26 (Show Source): You can put this solution on YOUR website! "Four years ago, Lisa was twice as old as John" 1. . . . "Four years from now, John will be three quarters of Lisa's age." 2. Substitute from eq. 1 into eq. 2, Then from eq. 1, . . . Right now, Lisa is 12 and John is 8.

Circles/388032: Find the center of a circle using this equation x^2+y^2-10x-10y+34=0. 1 solutions Answer 274342 by Fombitz(13828)   on 2010-12-20 10:41:16 (Show Source): You can put this solution on YOUR website! Complete the square in and . . . . The center of this circle is (,)

Miscellaneous_Word_Problems/388014: A biologist finds that the population of a certain type of bacteria doubles each half-hour. An initial culture has 90 bacteria. How long will it take for the number of bacteria to reach 368,640? 1 solutions Answer 274341 by Fombitz(13828)   on 2010-12-20 10:39:26 (Show Source): You can put this solution on YOUR website! where So then, minutes

test/387975: X sqaured + 11 x to the 6th + 18x to the 5th 1 solutions Answer 274340 by Fombitz(13828)   on 2010-12-20 10:34:45 (Show Source): You can put this solution on YOUR website! . . . What's the question??

test/388023: solve x+y=13 and x*y=40.find x and y 1 solutions Answer 274339 by Fombitz(13828)   on 2010-12-20 10:33:51 (Show Source): You can put this solution on YOUR website! 1. 2. From eq. 1, Substitute into eq. 2, Two solutions: Then from eq. 2, . . . . . .