Tutor:

New! Get regular updates about newly solved problems via algebra.com's RSS system.

---

Recent problems solved by 'checkley77'

checkley77 answered: 12560 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, >>Next

Triangles/243646: In an isoscele triangle, the length of one of the equal sides is three times the length of the third side. the perimeter is 21m. find the length of each side. 1 solutions Answer 178490 by checkley77(12569)   on 2009-11-29 18:21:42 (Show Source): You can put this solution on YOUR website! 2*3X+X=21 6X=X=21 7X=21 X=21/7 X=3 LENGTH OF THE THIRD SIDE. 3*3=9 ANS. LENGTH OF THE EQUAL SIDES. PROOF: 2*9+3=21 18+3=21 21=21

Circles/243651: Find the radius of a circle that has an area of 25π yd(squared) 1 solutions Answer 178488 by checkley77(12569)   on 2009-11-29 18:18:00 (Show Source): You can put this solution on YOUR website! AREA=PI*R^2 FORMULA FOR AREA OF CIRCLE. PI*25=PI*R^2 25=R^2 R=SQRT25 R=5 YDS. ANS. FOR THE RADIUS OF THE CIRCLE.

Coordinate-system/243653: find the coordinates of -x+3y=12, and 4x+3y=12 if x=3 1 solutions Answer 178481 by checkley77(12569)   on 2009-11-29 18:04:30 (Show Source): You can put this solution on YOUR website! what are the coordinates of -x+3y=12, and 4x+3y=12 if x=3 -x+3y=12 -3+3Y=12 3Y=12+3 3Y=15 Y=15/3 Y=5 ANS. (3,5) ----------------------- 4x+3y=12 4*3+3Y=12 12+3Y=12 3Y=12-12 3Y=0 Y=0 ANS. (3,0)

Coordinate-system/243654: what are the coordinates of -x+3y=12, and 4x+3y=12 if x=3 1 solutions Answer 178480 by checkley77(12569)   on 2009-11-29 18:02:18 (Show Source): You can put this solution on YOUR website! if x=3 WHAT ARE THE COORDINATES.? -x+3y=12 -3+3Y=12 3Y=12+3 3Y=15 Y=15/3 Y=5 ANS. (3,5) 4x+3y=12 4*3+3Y=12 12+3Y=12 3Y=12-12 3Y=0 Y=0 ANS. (3,0)

Points-lines-and-rays/243534: how do i find the perimeter of a triangle whose coordinates are A(-6,2),B(-3,6),and C(5,0) ? 1 solutions Answer 178477 by checkley77(12569)   on 2009-11-29 17:57:30 (Show Source): You can put this solution on YOUR website! A(-6,2),B(-3,6),and C(5,0) ? D=SQRT[(X2-X1)^2+(Y2-Y1)^2] D=SQRT(-3+6)^2+(6-2)^2=SQRT(3^3+4^2)=SQRT(9+16)=SQRT25=5 ANS. A TO B. D=SQRT(5+3)^2+(0-6)^2=SQRT(8^2-6^2)=SQRT(64+36)=SQRT100=10 ANS. B TO C. D=SQRT(5+6)^2+(0-2)^2=SQRT(11^2-2^2)=SQRT(121+4)=SQRT125=11.18 ANS. C TO A. 5+10+11.18=26.18 ANS. FOR THE PERIMETER.

Quadratic_Equations/243535: Please answer this question: You have a pool that measures 8 yards by 10 yards. You want to build a deck around all four siddes of the pool and you want to increase the total area to 120 square yards. The deck is the same width on both sides forming a perfect rectangle. What is the width of the deck? 1 solutions Answer 178472 by checkley77(12569)   on 2009-11-29 17:44:08 (Show Source): You can put this solution on YOUR website! 8*10=80 yds^62 is the area of the pool. (8+2x)(10+2x)=120 80+20x+16x+4x^2=120 4x^2+36x+80-120=0 4x^2+36x-40=0 4(x^2+9x-10)=0 4(x+10)(x-1)=0 x-1=0 x=1 yd. is the width of the deck. Proof: (8+2*1)(10+2*1)=120 (8+2)(10+2)=120 10*12=120 120=120

Expressions-with-variables/243536: Solve the system of equations by graphing. Then classify the system. 3u+v=6 3u=v+12 1 solutions Answer 178466 by checkley77(12569)   on 2009-11-29 17:35:32 (Show Source): You can put this solution on YOUR website! 3u+v=6 3x+y=6 y=-3x+6 (red line) 3u=v+12 3x=y+12 y=3x-12 (green line) (graph 300x200 pixels, x from -6 to 5, y from -10 to 15, of TWO functions -3x +6 and 3x -12). These 2 equations are independent (exactly 1 solution).

Linear_Equations_And_Systems_Word_Problems/243537: The Village Inn offers two special packages. For two nights and three meals the cost is $158. For two nights and five meals the cost is $181. Write and solve a system of linear equations to find the costs per night and per meal. 1 solutions Answer 178457 by checkley77(12569)   on 2009-11-29 17:19:28 (Show Source): You can put this solution on YOUR website! 2n+3m=158 -(2n+5m=181) subtract. ------------------- -2m=-23 m=-23/-2 m=$11.50 cost of a meal. 2n+3*11.50=158 2n+34.50=158 2n=158-34.50 2n=123.50 n=123.50/2 n=$61.75 cost of a nights lodging. Proof: 2*61.75+5*11.50=181 123.50+57.50=181 181=181

Miscellaneous_Word_Problems/243558: The total US consumption of ice cream in 2006 was 1.55 * 10^9 gallons. At the time, the US population was 300,000,000 people. Calculate the approximate average number of gallons of ice cream each person ate that year. 1 solutions Answer 178455 by checkley77(12569)   on 2009-11-29 17:10:08 (Show Source): You can put this solution on YOUR website! 1.55*10^9/3*10^8 15.5*10^8/3*10^8 15.5/3=5.1667 gal. per person.

Quadratic_Equations/243559: 1 solutions Answer 178454 by checkley77(12569)   on 2009-11-29 17:06:03 (Show Source): You can put this solution on YOUR website! You forgot to include the quadratic equation!

Rectangles/243561: The perimeter of a rectangle is 800 feet, and length of it is 50 feet less than half the width. What are it's dimensions? 1 solutions Answer 178453 by checkley77(12569)   on 2009-11-29 17:04:26 (Show Source): You can put this solution on YOUR website! L=W/2-50 P=2L+2W 800=2(W/2-50)+2W 800=W-100+2W 800+100=3W 900=3W 900/3=W 3OO=W ANS. FOR THE WIDTH. L=300/2-50 L=150-50 L=100 ANS. FOR THE LENGTH. PROOF: 800=2*100+2*300 800=200+600 800=800

Travel_Word_Problems/243576: a motorboat took 2 hours to make a downstream trip with a 5mph current. The return trip against the same current took 4 hours. Find the speed of the boat in still water. 1 solutions Answer 178444 by checkley77(12569)   on 2009-11-29 16:36:30 (Show Source): You can put this solution on YOUR website! D=RT D=(X+5)*2 D=(X-5)*4 (X+5)*2=(X-5)*4 2X+10=4X-20 2X-4X=-20-10 -2X=-30 X=-30/-2 X=15 MPH IS THE SPEED OF THE BOAT IN STILL WATER. PROOF: (15+5)*2=(15-5)*4 20*2=10*4 40=40

Unit_Conversion_Word_Problems/243579: A room measures 4 meters by 7 meters and the ceiling is 3 meters high. A liter of paint covers 20 square meters. How many liters of paint will it take to paint all but the floor of the room? Please show work. 1 solutions Answer 178441 by checkley77(12569)   on 2009-11-29 16:32:47 (Show Source): You can put this solution on YOUR website! You have 2 walls 4*3=12*2=24 m^2 You have 2 walls 7*3=21*2=42 m^2 24+42=66 m^2 total surface area. 66/20=3.3 liters of paint is needed.

Numbers_Word_Problems/243582: How many three-digit numbers have the sum of their digits equal to 20? This is a homework problem for me and I am simply stumped. we are working on permutations, factorials and trees. Thank you!! 1 solutions Answer 178440 by checkley77(12569)   on 2009-11-29 16:28:38 (Show Source): You can put this solution on YOUR website! I count 36. 992=20 983=20 974=20 965=20 956=20 947=20 938=20 929=20 893=20 884=20 875=20 866=20 857=20 848=20 839=20 794=20 785=20 776=20 767=20 758=20 749=20 695=20 686=20 677=20 668=20 659=20 596=20 587=20 578=20 569=20 497=20 488=20 479=20 398=20 389=20 299=20

Graphs/243584: soybean meal is 16% protein, cornmeal is 8% protein. how many pounds of each should be mixed together in order to get 320-lb mixture that is 14% protein? How many pounds of cornmeal? How many pounds of soybean? 1 solutions Answer 178434 by checkley77(12569)   on 2009-11-29 16:18:22 (Show Source): You can put this solution on YOUR website! .16x+.08(320-x)=.14*320 .16x+25.60-.08x=44.8 .08x=44.8-25.60 .08x=19.2 x=19.2/.08 x=240 lbs. of soybean are used. 320-240=80 lbs. of cornmeal is used. Proof: .16*240+.08*80=.14*320 38.4+6.4=44.8 44.8=44.8

Linear-equations/243586: The Fax Corporation bought a fax machine for $700. the fax machine depreciates at a rate of $25 a month (a) Find a function F that can be used to determine the value of the fax machine t months after purchase Complete the model below F(t)=? I also need to see a graph of this Can anyone please help me 1 solutions Answer 178432 by checkley77(12569)   on 2009-11-29 16:09:25 (Show Source): You can put this solution on YOUR website! f(x)=700-25x f(x)=-25x+700 (graph 300x200 pixels, x from -6 to 35, y from -100 to 700, -25x +700). 28 month after purchase it will be valued a $0.00.

Linear-systems/243390: 1. One number is 40 more than another. Find the number if the sum is 48. 2. The difference between 6 times a number and 12 equals the sum of the number and thirteen. Find the number. 3. One number exceeds another by 5. If the larger is increased by 5 and the smaller decreased by 8, the larger will be 12 less than twice the smaller. Find the original number. 1 solutions Answer 178376 by checkley77(12569)   on 2009-11-29 10:34:50 (Show Source): You can put this solution on YOUR website! 1) X-Y=40 X+Y=48 ADD -------------- 2X=88 X=88/2 X=44 ANS. 44-Y=40 Y=44-40 Y=4 ANS. PROOF: 44+4=48 48=48 ------------------ 2) 6X-12=X+13 6X-X=13+12 5X=25 X=25/5 X=5 ANS. PROOF: 6*5-12=5+13 30-12=18 18=18 ----------------------- 3) X-Y=5 OR X=Y+5 (X+5)+12=2(Y-8) Y+5+5+12=2Y-16 Y-2Y=-16-5-5-12 -Y=-38 Y=38 ANS. X-38=5 X=5+38 X=43 ANS. PROOF: 43+5+12=2(38-8) 60=2*30 60=60

Travel_Word_Problems/243391: Train A is traveling at 60 mph and train B is traveling 80 mph. Train A passes a station at 9:10 pm. If train B passes the same station at 9:25 pm, at that time will train B catch up to train A? 1 solutions Answer 178375 by checkley77(12569)   on 2009-11-29 10:24:07 (Show Source): You can put this solution on YOUR website! 60T=80(T-.25) 60T=80T-20 60T-80T=-20 20T=20 T=20/20 T=1 HOUR AFTER TRAIN A LEAVES THEY WILL MEET. 9:10+1:00=10:10 TIME OF THEIR MEETING. PROOF: 60*1=80(1-.25) 60=80*.75 60=60

Miscellaneous_Word_Problems/243414: A recent report stated that the five most popular ice cream flavors are vanilla (26%), chocolate (12.9%), Neapolitan (4.8%),strawberry (4.3%) and cookies " n " cream (4%).If 1000 people were interviewed concerning their favorite flavor of ice cream , how many would expect to say strawberry ? 1 solutions Answer 178374 by checkley77(12569)   on 2009-11-29 10:12:19 (Show Source): You can put this solution on YOUR website! 4.3%=.043 .043*1,000=43 PEOPLE WOULD SELECT STRAWBERRY.

Miscellaneous_Word_Problems/243416: A pound is 16 ounces . nine pennies weigh one ounce. If you have two pounds of pennies, how much money (in dollars and cents) do you have ? 1 solutions Answer 178373 by checkley77(12569)   on 2009-11-29 10:09:56 (Show Source): You can put this solution on YOUR website! .01*9*16*2=2.88 ANS.

Bodies-in-space/243430: What is the volumn in gallons of a tank with a 6' raduius and 3'deep? 1 solutions Answer 178371 by checkley77(12569)   on 2009-11-29 10:07:04 (Show Source): You can put this solution on YOUR website! V=BH V=2PIR*H V=2*3.14*6*3 V=113.04 fT^3 .35 FT^3=2.64 GAL. (113.04/.35)*2.64 645.94*2.64 1,705.3 GAL. ANS.

Square-cubic-other-roots/243431: multiply and simplify (5 - 2 square root 2)(7 + 7 square root 2) 1 solutions Answer 178364 by checkley77(12569)   on 2009-11-29 09:41:59 (Show Source): You can put this solution on YOUR website! (5 - 2 square root 2) (7 + 7 square root 2) multiply ------------------------ 35-14sqrt2+35sqrt2-14*2 combine the sqrt terms. 35+21sqrt2-28 combine the integers. 7+21sqrt2 extract the common factor 7. 7(1+3sqrt2) ans.

real-numbers/243432: a 12 foot tree casts a 16 foot shadow. How many feet tall is a nearby tree that casts a 20 foot shadow at the same time ? 1 solutions Answer 178363 by checkley77(12569)   on 2009-11-29 09:39:08 (Show Source): You can put this solution on YOUR website! 12/16=x/20 cross multiply. 16x=12*20 16x=240 x=240/16 x=15 ft. tall is the nearby tree. Proof: 12/16=15/20 3/4=3/4

Linear-systems/243429: find the coordinates of the y-intercept for the given equation:y=x-13 and y=3x-7 1 solutions Answer 178362 by checkley77(12569)   on 2009-11-29 09:36:47 (Show Source): You can put this solution on YOUR website! Y=mX+b [b = the Y intercept.] y=x-13 (red line) The Y intercept = -13 y=3x-7 (green line) The Y intercept = -7 (graph 300x200 pixels, x from -6 to 5, y from -15 to 10, of TWO functions x -13 and 3x -7).

Square-cubic-other-roots/243428: multiply and simplify (2 - 5 square root 2)(4 + 7 square root 2) 1 solutions Answer 178361 by checkley77(12569)   on 2009-11-29 09:32:14 (Show Source): You can put this solution on YOUR website! (2 - 5 square root 2) (4 + 7 square root 2) MULTIPLY. ------------------------------ 8-20SQRT2+14SQRT2-35*2 COMBINE THE SQRT TERMS. 8-6SQRT2-70 COMBINE THE INTERGERS. -62-6SQRT2 REDUCE THE INTEGERS. -2(31+3SQRT2) ANS.

Quadratic_Equations/243356: I have to solve using the quadratic formula 2/x + 5/x+2 = 1 1 solutions Answer 178300 by checkley77(12569)   on 2009-11-28 21:50:02 (Show Source): You can put this solution on YOUR website! 2/x+5/(x+2)=1 [2(x+2)+5x]/x(x+2)=1 [2x+4+5x]/(x^2+2x)=1 [7x+4]/(x^2+2x)=1 7x+4=x^2+2x x^2-2x-7x-4=0 x^2-9x-4=0 x=(9+-sqrt[-9^2-4*1*-4])/2*1 x=(9+-sqrt[81+16])/2 x=(9+-sqrt97)/2 x=(9+-9.85)/2 x=(9+9.85)/2 x=18.85/2 x=9.424 ans x=(9-9.85)/2 x=-.85/2 x=-.424 ans.

Systems-of-equations/243360: Decide whether or not the ordered pair is a solution of the system. (12, 6) y = 1/2x 2x + y = 18 1 solutions Answer 178296 by checkley77(12569)   on 2009-11-28 21:38:17 (Show Source): You can put this solution on YOUR website! (12, 6) y = 1/2x 6=1/2*12 6=6 ans. & a solution. 2x + y = 18 2*12+6=18 24+6=18 30=18 not a solution.

Polynomials-and-rational-expressions/243364: Please help. Problem: x^3-8 Could you please provide a step process. I think that it will look something like this: (x^2+2)(x-4) 1 solutions Answer 178295 by checkley77(12569)   on 2009-11-28 21:35:07 (Show Source): You can put this solution on YOUR website! x^3-8 (x-2)(x^2+2x+4) ans.

Triangles/243317: The measure of the third angle in an isosceles triangle is 60% greater than the measure of each equal angle. Find the measure of the third angle. 1 solutions Answer 178290 by checkley77(12569)   on 2009-11-28 21:06:41 (Show Source): You can put this solution on YOUR website! 2x+(x+60)=180 3x=180-60 3x=120 x=120/3 x=40 degrees are the 2 equal angles. 40+60=100 degrees is the odd angle. Proof 40+40+100=180 180=180

Polynomials-and-rational-expressions/243335: I need help factoring this trinomial. Problem: j^4-16 Please provide me with the steps. Here's the answer I came out with so far (j^2-4)(j^2+4) Is it right? I think the signs might be wrong. 1 solutions Answer 178289 by checkley77(12569)   on 2009-11-28 20:59:06 (Show Source): You can put this solution on YOUR website! j^4-16 both j^4 & 16 are perfect squares & this is the difference of squares. (j^2+4)(j^2-4) The second factor is once again a perfect square also. (j^2+4)(j+2)(j-2) ans.

Money_Word_Problems/243339: Colin invested 10,000, part at 14% and part at 17%. If the total interest at the end of the year is 1,490, how much did he invest at 14%? 1 solutions Answer 178287 by checkley77(12569)   on 2009-11-28 20:54:42 (Show Source): You can put this solution on YOUR website! .14x+.17(10,000-x)=1,490 .14x+1,700-.17x=1,490 -.03x=1,490-1,700 -.03x=-210 x=210/.03 x=$7,000 invested @ 14%. 10,000-7,000=3,000 invested @ 17% Proof: .14*7,000+.17*3,000=1,490 980+510=1,490 1,490=1,490