# See tutors' answers!

Algebra ->  Tutoring on algebra.com -> See tutors' answers!      Log On

 Tutoring Home For Students Tools for Tutors Our Tutors Register Recently Solved
 By Tutor
| By Problem Number |

Tutor:

# 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

 Polynomials-and-rational-expressions/330150: Can someone help me solve the problem x/3=4/x+1?1 solutions Answer 236586 by Fombitz(13828)   on 2010-08-09 09:28:33 (Show Source): You can put this solution on YOUR website! Multiply both sides by . Two solutions: . . .
 Travel_Word_Problems/330057: Janet has \$8.55 in nickels, dimes, and quarters. She has 7 more dimes than nickels and quarters combined. How many of each coin does she have? 3 years ago1 solutions Answer 236585 by Fombitz(13828)   on 2010-08-09 09:26:06 (Show Source): You can put this solution on YOUR website!1. 2. Substituting eq. 2 into eq. 1, There are multiple solutions because you have 1 equation with 2 unknowns. 1 nickels, 22 quarters, (19+4+7=)30 dimes 8 nickels,19 quarters, 34 dimes 15 nickels,16 quarters, 38 dimes 22 nickels,13 quarters, 42 dimes 29 nickels,10 quarters, 46 dimes 36 nickels,7 quarters, 50 dimes 43 nickels,4 quarters, 54 dimes 50 nickels,1 quarters, 58 dimes
 Word_Problems_With_Coins/330088: You have 52 coins consisting of nickels and half-dollars. The number of half-dollars is 2 less than twice the number of nickels. How many half-dollars do you have? How many nickels do you have?1 solutions Answer 236584 by Fombitz(13828)   on 2010-08-09 09:11:13 (Show Source): You can put this solution on YOUR website!Let be the number of half dollars, the number of nickels. 1. 2. Substitute eq. 2 into eq. 1, Then from eq. 2, . . . 34 half dollars and 18 nickels.
 Numbers_Word_Problems/330063: (2x^−2y^3)^−2/x^3y^−4)^2 Simplify1 solutions Answer 236582 by Fombitz(13828)   on 2010-08-09 09:08:00 (Show Source):
 Equations/330041: solve each equation 1/3 -k+3/6k = 1/3k - k-1/2k 1 solutions Answer 236579 by Fombitz(13828)   on 2010-08-09 09:02:16 (Show Source):
 Polynomials-and-rational-expressions/330046: Simplify by removing factors of 1 40^8/48q^12 = 1 solutions Answer 236578 by Fombitz(13828)   on 2010-08-09 08:59:05 (Show Source): You can put this solution on YOUR website!Do you mean ? . . .
 Equations/330035: 3x^2+16x^3/x multiplied by x^2/9x^2 -11 solutions Answer 236577 by Fombitz(13828)   on 2010-08-09 08:56:30 (Show Source):
 Equations/330034: 15t^3y^5/20w^7 multiplied by 24t^2w^3y^21 solutions Answer 236575 by Fombitz(13828)   on 2010-08-09 08:52:15 (Show Source):
 Equations/330033: 12a-6/x^2-161 solutions Answer 236572 by Fombitz(13828)   on 2010-08-09 08:49:07 (Show Source):
 expressions/330102: Translate the phrase to an algebraic expression. If no variable is given, use x as the variable. P increased by p 1 solutions Answer 236571 by Fombitz(13828)   on 2010-08-09 08:48:12 (Show Source):
 Graphs/330081: x2-4x=-4 x2+-11 solutions Answer 236570 by Fombitz(13828)   on 2010-08-09 08:47:35 (Show Source): You can put this solution on YOUR website!Your second expression is not an equation (missing =). Please correct and repost.
 Trigonometry-basics/330105: please find the slope of the tangent to the curve by y=cos x at x= pi/2 could you please show working. thank you.1 solutions Answer 236569 by Fombitz(13828)   on 2010-08-09 08:46:14 (Show Source): You can put this solution on YOUR website!The slope of the tangent is equal to the value of the derivative of cos(x) at that point. . . .
 Rational-functions/330082: Please Help me solve find all numbers for which the ratinoal expression is undefined - 9/16z (the entire problem is negative not just the nine)1 solutions Answer 236567 by Fombitz(13828)   on 2010-08-09 08:39:57 (Show Source): You can put this solution on YOUR website!The expression is undefined when the denominator equals zero since divison by zero is undefined.
 Square-cubic-other-roots/330130: simplify the provided power of i. show work 1 solutions Answer 236566 by Fombitz(13828)   on 2010-08-09 08:38:26 (Show Source):
 expressions/330106: What is the difference in elevation between the top of a mountain 8,867 ft above sea level and a point in a valley 248 ft below sea level? 1 solutions Answer 236564 by Fombitz(13828)   on 2010-08-09 08:35:52 (Show Source): You can put this solution on YOUR website!Above sea level would be a positive height, below sea level would be a negative height. ft
 Square-cubic-other-roots/330110: simplify the radical 1 solutions Answer 236563 by Fombitz(13828)   on 2010-08-09 08:32:34 (Show Source):
 Radicals/330127: in the right triangle, find the length of the side not given b=1, c=√17. The length of the third side is?1 solutions Answer 236561 by Fombitz(13828)   on 2010-08-09 08:31:01 (Show Source): You can put this solution on YOUR website!Use the Pythagorean theorem,
 Radicals/330129: simplify the radical expression. show work 1 solutions Answer 236560 by Fombitz(13828)   on 2010-08-09 08:29:38 (Show Source):
 Polynomials-and-rational-expressions/330126: solve 10x^4-17x^2+3=0 1 solutions Answer 236559 by Fombitz(13828)   on 2010-08-09 08:27:23 (Show Source): You can put this solution on YOUR website!This is a quadratic equation in and not . Solve it by factoring. Four solutions: . . .
 logarithm/330101: Solve the equation for x and round your answer to the nearest hundreth. 5 = ln(x + 1)1 solutions Answer 236558 by Fombitz(13828)   on 2010-08-09 08:24:28 (Show Source): You can put this solution on YOUR website! or approximately,
 Polynomials-and-rational-expressions/330124: Factor completely. 8x^8-16x^7+48x^61 solutions Answer 236557 by Fombitz(13828)   on 2010-08-09 08:22:17 (Show Source):
 Polynomials-and-rational-expressions/330120: Multiply (s+1/3)(s+1/4) 1 solutions Answer 236556 by Fombitz(13828)   on 2010-08-09 08:20:54 (Show Source): You can put this solution on YOUR website!Use the FOIL method,
 Square-cubic-other-roots/330122: simplify expression using division property of radicals. assume all variables represent positive real numbers. 1 solutions Answer 236555 by Fombitz(13828)   on 2010-08-09 08:19:40 (Show Source):
 Quadratic_Equations/330123: Wrie a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution 3, only solution. The solution is?1 solutions Answer 236554 by Fombitz(13828)   on 2010-08-09 08:18:37 (Show Source):
 Radicals/330111: simplify the radical. show work 1 solutions Answer 236551 by Fombitz(13828)   on 2010-08-09 08:17:57 (Show Source):
 Polynomials-and-rational-expressions/330113: multiply (-4x)^2(2x^2)^31 solutions Answer 236550 by Fombitz(13828)   on 2010-08-09 08:16:22 (Show Source):
 Equations/329954: Write the equation of a circle in standard form with the following properties. Center at (1, 1); radius 101 solutions Answer 236516 by Fombitz(13828)   on 2010-08-08 22:38:47 (Show Source):
 Exponential-and-logarithmic-functions/329970: Use th equation of the exponential function whose graph passes through the points (0, -2) and (2, -50) to find the value of y when x = -21 solutions Answer 236515 by Fombitz(13828)   on 2010-08-08 22:37:35 (Show Source): You can put this solution on YOUR website! . . . . . . . . .
 Equations/329956: The arch of an underpass is part of an ellipse. Find the equation of the ellipse. Assume a = 50, b = 15. ____________=11 solutions Answer 236514 by Fombitz(13828)   on 2010-08-08 22:34:28 (Show Source):
 Polynomials-and-rational-expressions/329967: For what value(s) of x is the expression x^2 - 4x + 4 / 2x^2 - 3x - 2 undefined? a. -1/2, 0, 2 b. -1/2, 2 c. -2, 1/2 d. -1/21 solutions Answer 236513 by Fombitz(13828)   on 2010-08-08 22:34:00 (Show Source): You can put this solution on YOUR website! The denominator equals zero when
Graphs/329962: Graph the inequality on a plane 4x+5y<=20
1 solutions

Answer 236512 by Fombitz(13828)   on 2010-08-08 22:29:58 (Show Source):
You can put this solution on YOUR website!
}

Graph the line,

.
.
.

Pick a point in either region.
(0,0) is always a convenient point.
Test the inequality.

True, (0,0) is in the solution region.