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 'checkley77'

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, >>Next

 Money_Word_Problems/208679: Susan wants to invest 5000. If she invests part at 7% simple interest, part at 6%, and receives a total of 332 after one year, how much does she invest at each rate? I need help with the formula and solution, please.1 solutions Answer 157926 by checkley77(12569)   on 2009-08-26 16:38:30 (Show Source): You can put this solution on YOUR website!.07X+.06(5,000-X)=332 .07X+300-.06X=332 .01X=332-300 .01X=32 X=32/.01 X=3,200 AMOUNT INVESTED \$ 7%. 5,000-3,200=1,800 INVESTED @ 6%. PROOF: .07*3,200+.06*1,800=332 224+108=332 332=332
 Linear-systems/208711: 30,000 people attended a ballgame at a stadium that offers two kinds of seats: general admission and reserved. The day's receipts were \$201,000. How many people paid \$13.00 for reserved seats, and how many paid \$4.00 for general admission?1 solutions Answer 157924 by checkley77(12569)   on 2009-08-26 16:32:40 (Show Source): You can put this solution on YOUR website!X+Y=30,000 X=30,000-Y 13X+4Y=201,000 13(30,000-Y)+4Y=201,000 390,000-13Y+4Y=201,000 -9Y=201,000-390,000 -9Y=189,000 Y=189,000/9 Y=21,000 \$4.00 TICKETS WERE SOLD. 30,000-21,000=9,000 \$13.00 TICKETS WERE SOLD. PROOF: 13*9,000+4*21,000=201,000 117,000+84,000=201,000 201,000=201,000
 Polynomials-and-rational-expressions/208726: Simplify each expression. Assume all variables represent nonzero real numbers. -4^0 – 3^0 1 solutions Answer 157921 by checkley77(12569)   on 2009-08-26 16:23:11 (Show Source): You can put this solution on YOUR website!-4^0 – 3^0 -1-1=-2 ANS.
 Angles/208739: The perimeter of a rectangle is 28m. The length of the retangle is 4m less than twice the width. Find the length1 solutions Answer 157919 by checkley77(12569)   on 2009-08-26 16:19:48 (Show Source): You can put this solution on YOUR website!2L+2W=28 L=2W-4 2(2W-4)+2W=28 4W-8+2W=28 6W=28+8 6W=36 W=36/6 W=6 NS. FOR THE WIDTH. L=2*6-4 L=12-4 L=8 ANS. FOR THE LENGTH. 2*8+2*6=28 16+12=28 28=28
 Angles/208740: an isosceles triangle has two sides of equal length. the length os the third side is 4 ft less than twice the length of an equal side. Find the length of the third side when the perimeter is 20 ft.1 solutions Answer 157918 by checkley77(12569)   on 2009-08-26 16:15:49 (Show Source): You can put this solution on YOUR website!x+x+(2x-4)=20 2x+2x-4=20 4x=20+4 4x=24 x=24/4 x=6 ft. is the length of the equal sides. 2*6-4=12-4=8 ft. is the length of the third side. Proof: 6+6+8=20 20=20
 Linear-equations/208748: which product represents the solution to the system: -y+7x=14 -x+4y=1 1 solutions Answer 157916 by checkley77(12569)   on 2009-08-26 16:03:49 (Show Source): You can put this solution on YOUR website!-y+7x=14 multiply by 4 & add. -x+4y=1 28x-4y=56 --------------------- 27x=57 x=57/27 x=19/9 ans. -19/9+4y=1 4y=1+19/9 4y=(9+19)/9 4y=28/9 y=(28/9)/4 y=(28/9)(1/4) y=28/36 y=7/9 ans. -7/9+7(19/9)=14 -7/9+133/9=14 126/9=14 14=14
 Coordinate-system/208782: Solve for the variable. non-integer answers may be left in fractional form or decimal form 3/5x + 7/10= 1/3x + 3/21 solutions Answer 157914 by checkley77(12569)   on 2009-08-26 15:54:45 (Show Source): You can put this solution on YOUR website!3/5x+7/10=1/3x+3/2 3x/5-x/3=3/2-7/10 (3x*3-x*5)/(5*3)=(3*10-7*2)/(2*10) (9x-5x)/15=(30-14)/20 4x/15=16/20 4x*20=15*16 80x=240 x=240/80 x=3 ans. Proof: 3*3/5+7/10=3/3+3/2 9/5+7/10=1+1.5 1.8+.7=2.5 2.5=2.5
 Travel_Word_Problems/208718: A postal truck leaves its station and heads to Chicago ,averaging 40 mph. An error in the mailing schedule is spotted and 24 minutes after the truck leaves, a car is sent to overtake the truck. If the car averages 50mph, how long will it take to catch the postal truck? 1 solutions Answer 157849 by checkley77(12569)   on 2009-08-26 10:32:23 (Show Source): You can put this solution on YOUR website!D=RT D=40X D=50(X-.4) SEEING AS THE DISTANCES ARE THE SAME SET THEM EQUAL TO EACH OTHER. 40x=50(x-.4) 40x=50x-20 40x-50x=-20 -10x-20 x=-20/-10 x=2 HOURS THEY WILL MEET. 40*2=50(2-.4) 80=50*1.6 80=80
 Expressions-with-variables/208724: A first square has a side of length x while the length of a side of second square is 2 units greater than the length of a side of the first square. What is an expression for the sum of the areas of the two squares?1 solutions Answer 157848 by checkley77(12569)   on 2009-08-26 10:26:13 (Show Source): You can put this solution on YOUR website!x^3+(x+2)^3 x^3+x^3+6x^2+12x=8 2x^3+6x^2+12x+8 2(x^3+3x^2+6x+4) ans.
 Equations/208597: I am not sure how to solve this question. I appreciate any help... Solve 28x-32>4(6x-1) Thank you so much!!!1 solutions Answer 157785 by checkley77(12569)   on 2009-08-25 20:34:51 (Show Source): You can put this solution on YOUR website!28x-32>4(6x-1) 28x-32>24x-4 28x-24x>-4+32 4x>28 x>28/4 x>7 ans. Proof: Let x=7.1 28*7.1-32>4(6*7.1-1) 198.8-32>4(42.6-1) 166.8>4*41.6 166.8>166.4
 Expressions-with-variables/208605: How to solve this equation please: 0.5(c+2.8) - c = 0.6c+0.3 Step by step would be nice. Anything is appreciated.1 solutions Answer 157783 by checkley77(12569)   on 2009-08-25 20:30:04 (Show Source): You can put this solution on YOUR website!0.5(c+2.8)-c=0.6c+0.3 .5c+1.4-c=.6c+.3 .5c-c-.6c=.3-1.4 -1.1c=-1.1 c=-1.1/-1.1 c=1 ans. Proof: .5(1+2.8)-1=.6*1+.3 .5*3.8-1=.6+.3 1.9-1=-.9 .9=.9
 expressions/208579: Can anyone please help me with the folowing problem? 6(9x-7) Thank you1 solutions Answer 157779 by checkley77(12569)   on 2009-08-25 20:13:35 (Show Source): You can put this solution on YOUR website!6(9x-7) 6*9x-6*7 54x-42 ans
 Equations/208581: Could you please help me out with this problem? Solve using addition and multiplication together... 3y-8= -1+2y Thanks!!!!!1 solutions Answer 157777 by checkley77(12569)   on 2009-08-25 20:11:55 (Show Source): You can put this solution on YOUR website!3y-8=-1+2y 3y-2y=-1+8 y=7 ans. Proof: 3*7-8=-1+2*7 21-8=-1+14 13=13
 Graphs/208589: m/5+3>91 solutions Answer 157776 by checkley77(12569)   on 2009-08-25 20:08:58 (Show Source): You can put this solution on YOUR website!m/5+3>9 m/5>9-3 m/5>6 m>6*5 m>30 ans. Proof: Let m=31 31/5+3>9 31/5>9-3 31/5>6 6.2>6
 Travel_Word_Problems/208590: Please help me solve this equation: What is the speed of a bus that travels 250.0 km in 2.00 hours?1 solutions Answer 157773 by checkley77(12569)   on 2009-08-25 20:06:20 (Show Source): You can put this solution on YOUR website!250/2=125 KM PER HOUR IS THE SPEED OF THE BUS.
 Rectangles/208558: The length of a rectangle is 5 cm more than the width. The area is 84cm sq. Find the dimensions of the rectangle.1 solutions Answer 157772 by checkley77(12569)   on 2009-08-25 20:04:42 (Show Source): You can put this solution on YOUR website!L=W+5 LW=84 (W+5)W=84 W^2+5W-84=0 (W+12)(W-7)=0 W-7=0 W=7 ANS. FOR THE WIDTH. L=7+5=12 ANS. FOR THE LENGTH. PROOF: 7*12=84 84=84
 Expressions-with-variables/208560: If the temperature in degrees Fahrenheit is known, the temperature in degrees celsius can be found by substituting the fahrenheit temperature f in the following expression 5/9[f-32] on a hot day the temperature is 35 degrees celsius what is the temperature in degrees fahrenheit1 solutions Answer 157770 by checkley77(12569)   on 2009-08-25 20:00:54 (Show Source): You can put this solution on YOUR website!35=5/9[f-32] 35=(5f-160)/9 35*9=5f-160 5f=315+160 5f=475 f=475/5 f=95 degrees fahrenheit is the ans.
 Travel_Word_Problems/208562: If train A leaves the station going 60 miles per hour and train B leaves one hour later going 85 miles per hour, how long will it take train B to catch up with train A?1 solutions Answer 157766 by checkley77(12569)   on 2009-08-25 19:47:59 (Show Source): You can put this solution on YOUR website!D=RT D=60T FOR TRAIN A. D=85(T-1) FOR THRAIN B. KNOWING THAT THE DISTANCES ARE THE SAME WE SET THE DISTANCE EQUATIONS EQUAL TO EACH OTHER. 60T=85(T-1) 60T=85T-85 60T-85T=-85 -25T=-85 T=-85/-25 T=3.4 HOURS AFTER TRAIN A LEAVES TRAIN B WILL CATCH UP TO IT. PROOF: 60*3.4=85(3.4-1) 204=85*2.4 204=204
 Linear-equations/208570: Find the equations in standard form with all coefficient integers of the line perpendicular to x + 3y = 6 and passing through (-3,3)1 solutions Answer 157765 by checkley77(12569)   on 2009-08-25 19:32:07 (Show Source): You can put this solution on YOUR website!x + 3y = 6 (a line perpendicular to & passing through (-3,3)) 3Y=-X+6 Y=-X/3+6/3 Y=-X/3+2 THIS LINE HAS A SLOPE=-1/3. A PERPENDICULAR LINE HAS A SLOPE=3 3=-3*3+b 3=-9+b 3+9=b b=12 THE Y INTERCEPT OF THE PERPENDICULAR LINE. Y=3X+12 (graph 300x200 pixels, x from -6 to 5, y from -10 to 20, 3x +12).
 expressions/208572: This question is from textbook can anyone help me with this problem? evaluate xy if x=-6 and y=4? Would you multiply -6 and 4? Thank you1 solutions Answer 157762 by checkley77(12569)   on 2009-08-25 19:21:35 (Show Source): You can put this solution on YOUR website!evaluate xy if x=-6 and y=4? xy=x*y So -6*4=-24 ans.
 Average/208575: How do I work this problem:"Latisha started with two scores: 72% and 89%. Confirm that the average of these two scores is 80.5%."1 solutions Answer 157761 by checkley77(12569)   on 2009-08-25 19:19:49 (Show Source): You can put this solution on YOUR website!72% and 89% (72+89)/2=161/2=80.5 ans.
 Miscellaneous_Word_Problems/208422: (70a-40b)/-101 solutions Answer 157760 by checkley77(12569)   on 2009-08-25 19:18:14 (Show Source): You can put this solution on YOUR website!(70a-40b)/-10 -7a+4b ans.
 Graphs/208458: 2y^4-y^3-6y^21 solutions Answer 157756 by checkley77(12569)   on 2009-08-25 19:04:33 (Show Source): You can put this solution on YOUR website!2y^4-y^3-6y^2 Y^2(2Y^2-Y-6) Y^2(2Y+3)(Y-2) ANS.
 Quadratic_Equations/208463: 1/2x-5/3=-1/2x+19/41 solutions Answer 157753 by checkley77(12569)   on 2009-08-25 18:58:33 (Show Source): You can put this solution on YOUR website!1/2x-5/3=-1/2x+19/4 X/2+X/2=19/4+5/3 X=(19*3+5*4)/(4*3) X=(57+20)/12 X=77/12 ANS. PROOF: 1/2*77/12-5/3=-1/2*77/12+19/4 77/24-5/3=-77/24+19/4 77/24+77/24=19/4+5/3 154/24=(19*3+5*4)/12 154/24=(57+20)/12 154/24=77/12 24*77=12*154 1848=1848
 Quadratic_Equations/208464: -2/3(6/5-7/10)=17/201 solutions Answer 157751 by checkley77(12569)   on 2009-08-25 18:49:11 (Show Source): You can put this solution on YOUR website!-2/3(6/5-7/10)=17/20 -2/3(6*2-7)/10=17/20 -2/3(12-7)/10=17/20 -2/3*5/10=17/20 -10/30 DOES NOT =17/20 SOMETHING IS WRONG HERE! CORRECT & RESUBMIT.
 Angles/208490: I am having trouble setting up this problem: In Triangle ABC, the measure of angle A is 141 degree's more than the measure of angle B. The measure of angle B is the same as the measure of angle C. What is the measure of each angle. 1 solutions Answer 157750 by checkley77(12569)   on 2009-08-25 18:39:52 (Show Source): You can put this solution on YOUR website!B=C A=B+141 OR A-B=141 A+B+C=180 A+2B=180 -(A-B=141) SUBTRACT THESE TWO EQUATIONS ---------------------- 2B+B=39 3B=39 B=39/3 B=13 DEGREES. C=13 DEGREES. A=13+141 A=154 DEGREES. PROOF: 154+13+13=180 180=180
 Graphs/208496: solve the system using the substution method 2x-6y=-4 7x+y=25 solution (?/22,39/?)1 solutions Answer 157749 by checkley77(12569)   on 2009-08-25 18:25:45 (Show Source): You can put this solution on YOUR website!2x-6y=-4 7x+y=25 or y=25-7x 2x-6(25-7x)=-4 2x-150+42x=-4 44x=-4+150 44x=146 x=146/44 x=73/22 ans. y=25-7*73/22 y=25-511/22 y=(25*22-511)/22 y=(550-511)/22 y=39/22 ans. solution (73/22,39/22)
 Expressions-with-variables/208497: Blake has a total of \$1600 to invest in 2 accounts. one account earns 5% simple intereest and the other earns 7% simple interest. how much should be invested in both accounts to earn exactly \$90 at the end of 1 year? ? 5% account ? 7% account1 solutions Answer 157744 by checkley77(12569)   on 2009-08-25 18:18:20 (Show Source): You can put this solution on YOUR website!.07x+.05(1,600-x)=90 .07x+80-.05x=90 .02x=90-80 .02x=10 x=10/.02 x=500 amount invested @ 7% 1,600-500=1,100 amount invested @ 5% Proof: .07*500+.05*1,100=90 35+55=90 90=90
 Linear-systems/208501: Solve the linear system: 2x + 7y = 41, 2y = 3x + 11 solutions Answer 157742 by checkley77(12569)   on 2009-08-25 18:14:03 (Show Source): You can put this solution on YOUR website!2x+7y=41 multiply this equation by 3 2y=3x+1 -3x+2y=1 multiply this equation by 2 and add them 6x+21y=123 -6x+4y=2 ----------------------- 25y=125 y=125/5 y=5 ans. 2x+7*5=41 2x+35=41 2x=41-35 2x=6 x=6/2 x=3 ans. Proof: -3*3+2*5=1 -9+10=1 1=1
 Signed-numbers/208507: factor 20x-441 solutions Answer 157740 by checkley77(12569)   on 2009-08-25 18:07:19 (Show Source): You can put this solution on YOUR website!20x-44 4(5x-11) ans.
 Money_Word_Problems/208508: 2. Jane went to the race course with \$70 in her pocket. She bet all \$70. In the first four races Jane won \$16, lost\$12, lost \$7, won \$5. Overall how much money did Jane win or lose? 1 solutions Answer 157739 by checkley77(12569)   on 2009-08-25 18:06:01 (Show Source): You can put this solution on YOUR website!70+16-12-7+5=72 she won a total of \$2 dollars.