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 'rfer'

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, >>Next

 Money_Word_Problems/467736: . a. Solve for n: 2(n - 1) = 3(n + 5) b. Find the zero of the function f(x)= 8 – 2x 1 solutions Answer 320956 by rfer(12678)   on 2011-07-06 19:09:33 (Show Source): You can put this solution on YOUR website!A) 2n-2=3n+15 -n=17 n=-17 B) (0,8) (4,0)
 Equations/467738: the odometer on Mr. Sweden's car read 36,345.8 mi. when he filled up with gas . The next time he bought gas , it took 8.6 gal. to fill up and he noticed his odometer read 36,504.9 mi . how many miles per gallon does Mr. Sweden's car get ?1 solutions Answer 320955 by rfer(12678)   on 2011-07-06 19:04:07 (Show Source): You can put this solution on YOUR website!(36504.9-36345.8)/8.6=18.5 mpg
 Angles/467740: Hello I am in need of help with a problem. The directions are, use a algebraic equation to find the measures of the two angles discribed. Begin by letting x represent the degree measure of the angle's complement or its supplement. The measure of the angle is 81degrees more than twice that of its supplement. I would really appreciate it if someone could help me. Thank you in advance 1 solutions Answer 320954 by rfer(12678)   on 2011-07-06 19:01:54 (Show Source): You can put this solution on YOUR website!x+2x+81=180 3x=99 x=33 2x+81=147
 Polynomials-and-rational-expressions/467743: omg! please help with these fractions! (1/16x^4 + 3/7x^3 + 7/8x^2 +4) + (-9/16x^4 + 1/8x^2 -4)1 solutions Answer 320952 by rfer(12678)   on 2011-07-06 18:59:05 (Show Source): You can put this solution on YOUR website!=-1/2x^4+3/7x^3+x^2
 Money_Word_Problems/467624: At his son's birth, a man invested \$2,000 in savings at 6% for his son's college education. In 19 years, how much, approximately, will be available? 1 solutions Answer 320882 by rfer(12678)   on 2011-07-06 14:01:49 (Show Source): You can put this solution on YOUR website!A=2000(1.06)^19 A=2000*3.0256 A=\$6051.20
 Triangles/467633: The sum of the measures of angles of a triangle are 180. If the largest angle is nine time larger than the smallest angle, and the third angle is 70 degrees larger than the smallest angle, find the measure of the angles1 solutions Answer 320881 by rfer(12678)   on 2011-07-06 13:58:09 (Show Source): You can put this solution on YOUR website!x+9x+x+70=180 11x=110 x=10 9x=90 x+70=80
 Evaluation_Word_Problems/467634: Use scientific notation to divide the two numbers. Express answer using scientific notation; retain at least three decimal places. Please show all work. (8.7•10^9)•(3.22•10^2)1 solutions Answer 320880 by rfer(12678)   on 2011-07-06 13:56:05 (Show Source): You can put this solution on YOUR website!=28.014x10^11 it becomes =2.8014x10^12 multiply the numbers and add the exponents.
 test/467636: Hi i need help with ny practice test that my teacher gave me and is big package and im doing " Percent Word Problems" 1.what percent of 126 is 22 ? 2. what percent of 137.4 is 96? 3.79.9 is 90% of what ? 4.73% of what is 156.4 ?1 solutions Answer 320879 by rfer(12678)   on 2011-07-06 13:52:16 (Show Source): You can put this solution on YOUR website!1) 22/126=0.175=17.5% 2) 96/137.4=0.70=70% 3) 79.9/0.90=88.78 4) 156.4/0.0473=3306.55
 Travel_Word_Problems/467496: Traveling via car a total distance of 1698 miles to Tx. In order to reach our location in Tx within a time of 24 hours, what speed will we have to average? What speed will we have to travel in order to achieve the requested average? 1 solutions Answer 320876 by rfer(12678)   on 2011-07-06 13:29:18 (Show Source): You can put this solution on YOUR website!1698/24=70.75 mph
 Linear-equations/467448: Please help me with this algebra problem. Given the equation y=2/7x + 3, find the y coordinates of (-7) (0) and (7) please show work and if you can please plot the points and graph the linear equation. I just can not get this one!1 solutions Answer 320744 by rfer(12678)   on 2011-07-05 22:00:29 (Show Source): You can put this solution on YOUR website!y=2/7*-7+3 y=-2+3 y=1 (-2,1) ------------- y=2/7*0+3 y=3 (0,3) ------------ y=2/7*7+3 y=2+3 y=5 (7,5)
 Miscellaneous_Word_Problems/467428: In a mixture of concret there are two pounds of cement mix for each pound of gravel if the mixture contains a total of 93 pounds of these two ingredients how many pounds of gravel ate ther 1 solutions Answer 320738 by rfer(12678)   on 2011-07-05 21:20:41 (Show Source): You can put this solution on YOUR website!x+2x=93 3x=93 x=31# gravel 2x=62
 Numbers_Word_Problems/466960: the sum of two consecutive even number is 26 what are the two numbers? 1 solutions Answer 320359 by rfer(12678)   on 2011-07-04 15:15:18 (Show Source): You can put this solution on YOUR website!12+14=26
 Linear-systems/466968: i can't under stand if 3x+2y = -17 2x-5y = 14 the what is the process i can't under stand what i need is Ex: this i understand X+2y=5 y=2x X+2y=5 x+2(2x)= 5 x+4x=5 x+ 4= 5 5x and 5 divided by 5 y = 1 that i under stand but below i don't get it THIS!! Explanation: Solving: 3x+2y = -17 2x-5y = 14 Using Substitution Method. Expressing x as a function of y (from the first equation) x = (-17 -2y)/3 Substituting this expression into the second equation: 2(-17+2y)/3-5y = 14 Simplifying this expression: (-19)y = 76 or y = -4 Now, substituting y = -4 back into the x expressed as a function of y: x = (-17-2y)/3 = -3 1 solutions Answer 320358 by rfer(12678)   on 2011-07-04 15:13:53 (Show Source): You can put this solution on YOUR website!3x+2y=-17 2x-5y=14 2x=5y+14 x=2.5y+7 -------------- 3*(2.5y+7)+2y=-17 7.5y+21+2y=-17 9.5y=-38 y=-4 ----------------- 3x+2*-4=-17 3x-8=-17 3x=-9 x=-3 --------------- 2*-3-5*-4=14 -6+20=14
 Angles/466975: if the supplement of an angle is 10 less than thrice the complement of an angle, find the angle, its complement and supplement?1 solutions Answer 320353 by rfer(12678)   on 2011-07-04 15:01:36 (Show Source): You can put this solution on YOUR website!x+3x-10=90 4x=100 x=25 comp 3x-10=65 angle 180-65=115 sup
 Travel_Word_Problems/467017: Hello, I have a word problem on travel and distance. Two cars are 400 miles apart. Both start at the same time and travel toward one another. They meet 4 hours later. If the speed of one car is 20 miles per hour faster than the other, what is the speed of each car? Thank you1 solutions Answer 320350 by rfer(12678)   on 2011-07-04 14:55:44 (Show Source): You can put this solution on YOUR website!x+x+20=400/4 2x+20=100 2x=80 x=40 mph x+20=60 mph
 Geometric_formulas/466999: Hi I was hoping someone could help me with this problem! Thank you!! :) Express in set-builder notation. D = {5, 10, 15, 20,... } 1 solutions Answer 320348 by rfer(12678)   on 2011-07-04 14:53:49 (Show Source): You can put this solution on YOUR website!{D|D IS MULTIPLE OF 5 BETWEEN 5 AND INFINITY}
 Human-and-algebraic-language/467019: You invested 14,000 in two accounts paying 6% and 9% annual interest, respectively. If the total interest earned for the year \$900, how much was invested at each rate?1 solutions Answer 320347 by rfer(12678)   on 2011-07-04 14:51:38 (Show Source): You can put this solution on YOUR website!0.06x+0.09(14000-x)=900 0.06x+1260-0.09x=900 -0.03x=-360 x=\$12,000 at 6% 14000-12000=\$2,000 at 9%
 Points-lines-and-rays/467032: Find the measure of the angle of a triangle if the measure of the first angle is twice the measure of the second angle and the third angle is 20 degrees more than the second angle1 solutions Answer 320346 by rfer(12678)   on 2011-07-04 14:47:53 (Show Source): You can put this solution on YOUR website!2x+x+x+20=180 4x=160 x=40 #2 2x=80 #1 x+20=60 #3
 Polynomials-and-rational-expressions/467033: 1. f(x)= xcube-3xsquared-10x+24 given: 2 is a zero List all zeros: Factored Form:1 solutions Answer 320340 by rfer(12678)   on 2011-07-04 14:45:34 (Show Source): You can put this solution on YOUR website!(-3,0), (2,0), (4,0)
 Triangles/467031: if one side of a trangle measure 50 what do the other two sides equal?1 solutions Answer 320339 by rfer(12678)   on 2011-07-04 14:41:35 (Show Source): You can put this solution on YOUR website!30, 40, 50
 Expressions-with-variables/467067: 13-3z= The answer is 31 over 2. I am not figuring out how the answer was reached, please help with steps.1 solutions Answer 320338 by rfer(12678)   on 2011-07-04 14:39:10 (Show Source): You can put this solution on YOUR website!z=4.33 I don't know where you got your answer from, but it is no good.
 Geometry_Word_Problems/467069: 6 2/3 yd multiplied by 4 1/2 yd and it \$18 per square yard what will it cost to re carpet my living room?1 solutions Answer 320337 by rfer(12678)   on 2011-07-04 14:34:29 (Show Source): You can put this solution on YOUR website!4.5*6.667=30 sq yds 30*18=\$540.00
 Polynomials-and-rational-expressions/467036: f(x)= xcubed-5xsquared-4x-20 List possible zeros Actual zeros1 solutions Answer 320336 by rfer(12678)   on 2011-07-04 14:32:43 (Show Source): You can put this solution on YOUR website!one zero at (7,0)
 Linear-equations/467044: x-y=5? graph each linear equation by finding x and y intercepts.1 solutions Answer 320335 by rfer(12678)   on 2011-07-04 14:27:38 (Show Source): You can put this solution on YOUR website!(5,0) (0,-5)
 Equations/467050: I need help solving 3(P-2)=P+7 ok so I have 3P-6+P+7 then you would move the P to the other side making it -P so it would be 2P then move the 6 to the other side making it -6 so that would be 1 so 2P=1 then P= 1/2. Is that right? thank you,1 solutions Answer 320334 by rfer(12678)   on 2011-07-04 14:18:48 (Show Source): You can put this solution on YOUR website!3p-6=p+7 2p=13 p=6 1/2
 Travel_Word_Problems/467025: A sled dog race extends for 1049 mi from Anchorage to Nome. If a musher is twice as far from Anchorage as from Nome, how many miles has the musher traveled?1 solutions Answer 320309 by rfer(12678)   on 2011-07-04 11:14:54 (Show Source): You can put this solution on YOUR website!1049*2/3=699 miles
 Angles/466932: The measure of an angle is 52 more than the measure of its compliment. What is the measure of the angle?1 solutions Answer 320307 by rfer(12678)   on 2011-07-04 11:11:06 (Show Source): You can put this solution on YOUR website!x+x+52=90 2x=38 x=19 x+52=71
 Numbers_Word_Problems/466955: what is the new number formed if in the number,7 348,the thousands and the ones digits are interchanged?please answer it for me.thank you 1 solutions Answer 320305 by rfer(12678)   on 2011-07-04 11:06:46 (Show Source): You can put this solution on YOUR website!7843
 Travel_Word_Problems/466958: A car travels for 2 hours at 50 mph. How far will the car have gone?1 solutions Answer 320303 by rfer(12678)   on 2011-07-04 11:04:15 (Show Source): You can put this solution on YOUR website!D=rt D=50*2 D=100 mi
 Angles/466988: What are the measures of two complementary angles if the difference in their measure is 101 solutions Answer 320302 by rfer(12678)   on 2011-07-04 11:00:21 (Show Source): You can put this solution on YOUR website!x+x+10=90 2x=80 x=40 x+10=50
 Volume/467011: Please help a show formula: The Pet Kennel measures 26 in. long, 19 in. high, and 16 in. wide. What is the volume of the pet kennel?1 solutions Answer 320300 by rfer(12678)   on 2011-07-04 10:57:17 (Show Source): You can put this solution on YOUR website!V=26*19*16 You do the math