Tutor:

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

---

Recent problems solved by 'richwmiller'

richwmiller answered: 9132 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, >>Next

test/588057: 1 solutions Answer 374352 by richwmiller(9143)   on 2012-03-17 16:08:57 (Show Source): You can put this solution on YOUR website! yes

Linear-equations/588060: Is this grapg parallel y+3+5x and 8x-5 =-2 1 solutions Answer 374350 by richwmiller(9143)   on 2012-03-17 16:07:10 (Show Source): You can put this solution on YOUR website! Try spell check and look over the equations. Hit the green beer early did you?

Mixture_Word_Problems/587503: A baker wants to make a 15-pound blend of flour that costs $.60 per pound. The blend is made using a rye flour that costs $.70 per pound and a wheat flour that costs $.40 per pound. How many pounds of each flour should be used? 1 solutions Answer 374153 by richwmiller(9143)   on 2012-03-15 19:53:26 (Show Source): You can put this solution on YOUR website! 15*.6=.7x+.4y x+y=15

Polynomials-and-rational-expressions/587502: I'm not sure how to find the greatest common factor of a polynomial. What is the greatest common factor of 9m^3+30m-24? How'd you get it? 1 solutions Answer 374151 by richwmiller(9143)   on 2012-03-15 19:47:01 (Show Source): You can put this solution on YOUR website! right off I see 3 is a factor. 9m^3+30m-24 3*(3m^3+10m-8) Do you really mean 9m^3? If you did then we are done. If you meant 9m^2 then 3m^2+10m-8= (m+4)*(3m-2)

Rectangles/587488: how would you draw this out: find the area of a rectangle which has one side of 8 cm and whose diagonal is 10 cm? 1 solutions Answer 374149 by richwmiller(9143)   on 2012-03-15 19:41:01 (Show Source): You can put this solution on YOUR website! Pythagorean theorem a^2+b^2=c^2 a=8 c=10 find b and then get a*b

Volume/587491: a paperweight made of glass with a density of 3.5 grams per cubic centimeterhow much does the paperweight weigh lenth of 8 centimeters with not the word with of 6 centimeters how much does the paperweight weigh? 1 solutions Answer 374145 by richwmiller(9143)   on 2012-03-15 19:37:17 (Show Source): You can put this solution on YOUR website!

Linear-equations/587490: I found the 2 point equation and cannot find one for 3 point. I need help writing a 3 point equation of the line. (0,4) (2,6) (3,7) y=__x plus ____ 1 solutions Answer 374143 by richwmiller(9143)   on 2012-03-15 19:34:58 (Show Source): You can put this solution on YOUR website! Find the line for (0,4) and (3,7) See if (2,6) fits in the equation

Radicals/587489: 9ył-49=0 i need three answers just help with how to do this one please 1 solutions Answer 374140 by richwmiller(9143)   on 2012-03-15 19:27:13 (Show Source): You can put this solution on YOUR website! There is one real solution and you guessed it two complex solutions. Complex solutions always come in pairs. y = (7/3)^(2/3) y = (-7/3)^(2/3)=-0.879605+1.52352i y = -(-1)^(1/3) (7/3)^(2/3)=-0.879605-1.52352i

Exponential-and-logarithmic-functions/587486: how do you factor this problem? x^4-16 1 solutions Answer 374137 by richwmiller(9143)   on 2012-03-15 19:22:05 (Show Source): You can put this solution on YOUR website! (x^2-4)* (x^2+4) (x-2) (x+2) (x^2+4)

Mixture_Word_Problems/587391: How many gallons of a 10% acid solution and a 30% acid solution need to be mixed to make 20 gallons of a 22% acid solution? 1 solutions Answer 374114 by richwmiller(9143)   on 2012-03-15 16:37:55 (Show Source): You can put this solution on YOUR website! x+y=20 .1x+.3y=.22*20 x=8 y=12

Age_Word_Problems/587382: Jack is 17 years old and his sister is four years younger than he is. In how many years will the sum of their ages be triple what the sum of their ages is now? 1 solutions Answer 374113 by richwmiller(9143)   on 2012-03-15 16:36:10 (Show Source): You can put this solution on YOUR website! s=j-4 j=17 3*(j+s)=(j+s+2x) j = 17, s = 13, x = 30 In 30 years their ages will add up to 90 now their ages add up to 30

Length-and-distance/587292: Bruno is sketching a scale drawing of a flag that is 4ft tall and 6ft wide. If his drawing is 15in long how wide will it be? 1 solutions Answer 374060 by richwmiller(9143)   on 2012-03-15 13:41:52 (Show Source): You can put this solution on YOUR website! 4/6=15/x 2/3=15/x x=45/2=22.5

Polynomials-and-rational-expressions/587316: (2x - 7)/(x^(2) + 5x - 24) 1 solutions Answer 374059 by richwmiller(9143)   on 2012-03-15 13:39:34 (Show Source): You can put this solution on YOUR website! Nice expression. What about it?

Linear_Equations_And_Systems_Word_Problems/587286: A man invested three equal amounts of money at 5%,16% and 25% annual interest rates,respectively.If his total annual income is 552,000 pesos, how much did he invest at each rate? 1 solutions Answer 374057 by richwmiller(9143)   on 2012-03-15 13:37:49 (Show Source): You can put this solution on YOUR website! .05x+.16x+.25x=552000 x=1,200,000 pesos

Geometry_Word_Problems/587298: The area of a pizza is 220 square centimeters what is the radius? 1 solutions Answer 374056 by richwmiller(9143)   on 2012-03-15 13:35:01 (Show Source): You can put this solution on YOUR website! a=pi*r^2 220=pi*r^2 r=8.36828 or r = 2 sqrt(55/pi)

Linear-equations/587305: In the equation: y = mx + b , what would b= out of the coordinate (-3,0)? 1 solutions Answer 374055 by richwmiller(9143)   on 2012-03-15 13:32:15 (Show Source): You can put this solution on YOUR website! Not enough info. (-3,0) is not a coordinate. It is a point with the x coordinate equal to -3 and the y coordinate equal to 0

Quadratic-relations-and-conic-sections/587313: The graph of the equation below is an ellipse. What is the y-coordinate of the center of that ellipse? (x-4)^2/6^2+(y+8)^2/7^2=1 1 solutions Answer 374054 by richwmiller(9143)   on 2012-03-15 13:28:39 (Show Source): You can put this solution on YOUR website! The center is (4,-8) where -8 is the y coordinate.

test/587314: Is the diameter half of the circumference? 1 solutions Answer 374053 by richwmiller(9143)   on 2012-03-15 13:26:32 (Show Source): You can put this solution on YOUR website! No The radius is half the diameter.

Quadratic-relations-and-conic-sections/587312: Find the answer to a cone the has a height of 7cm and a base that is 2cm. 1 solutions Answer 374052 by richwmiller(9143)   on 2012-03-15 13:25:59 (Show Source): You can put this solution on YOUR website! You have not stated a question. What is the problem with the cone? Do you want to know the color? How much ice cream it will hold? Will it fit on your head?

Age_Word_Problems/587310: Two sisters differ in age by 11 years. Three years ago the product of their ages was 276. How old is each sister now? 1 solutions Answer 374051 by richwmiller(9143)   on 2012-03-15 13:24:39 (Show Source): You can put this solution on YOUR website! t-s=11; (t-3)*(s-3)=276 t=26 s=15

Geometry_Word_Problems/587288: The area of a rectangle is 24 square meters. Find the length and width of the rectangle if its length is 5 meters greater than its width. Use an equation and the formula for Area of a rectangle = (width)(length). 1 solutions Answer 374046 by richwmiller(9143)   on 2012-03-15 11:49:20 (Show Source): You can put this solution on YOUR website! L*W=24 L=W+5 W*(W+5)=24 W^2+5w-24=0 (W+8)*(W-3)=0 W=-8 W=3 Measurements must be positive W=3 L=8

Age_Word_Problems/587274: Father: When I was your age, you were 3 years old. Son: When I reach your age, you will be 63 years old. What is the father's present age? 1 solutions Answer 374044 by richwmiller(9143)   on 2012-03-15 11:45:15 (Show Source): You can put this solution on YOUR website! s-x=3; f-x=s; s+x=f; f+x=63 f=43 s=23 x=20

Matrices-and-determiminant/587289: 3x+2y=13 2x-y=4 1 solutions Answer 374042 by richwmiller(9143)   on 2012-03-15 11:37:44 (Show Source): You can put this solution on YOUR website! x=3 y=2

Money_Word_Problems/587277: Bob bought some land costing $120,500. Today that same land is valued at $235,000. Land has been appreciating in value by 7 percent each year. How long has Bob owned this land? (Round to 2 decimal places). 1 solutions Answer 374041 by richwmiller(9143)   on 2012-03-15 11:32:24 (Show Source): You can put this solution on YOUR website! 120500^1.07^x=235000 x=9.87 1=128935 2=137960.45 3=147617.6815=147617.68 4=157950.919205=157950.92 5=169007.48354935=169007.48 6=180838.0073978045=180838.01 7=193496.667915650815=193496.68 8=207041.43466974637205=207041.43 9=221534.3350966286180935=221534.34 10=237041.738553392621360045=237041.74

Numeric_Fractions/586879: 5 1/3 + 3 1/12 + 4 1/6 = 1 solutions Answer 373945 by richwmiller(9143)   on 2012-03-14 17:53:24 (Show Source): You can put this solution on YOUR website! 5 1/3 + 3 1/12 + 4 1/6= 5 4/12 + 3 1/12 + 4 2/12 12 7/12

Age_Word_Problems/586894: I have this word problem and it reads, Steve's mom's age is 7 years less than three times Steve's age. The sum of their ages is 65 years. Find their ages. By the way what are the equations? 1 solutions Answer 373943 by richwmiller(9143)   on 2012-03-14 17:49:56 (Show Source): You can put this solution on YOUR website! m=3s-7 s+m=65 m=47 s=18

Rectangles/586911: how do you write an expression for the area and perimeter of a regular square in terms of x? 1 solutions Answer 373942 by richwmiller(9143)   on 2012-03-14 17:47:56 (Show Source): You can put this solution on YOUR website! p=4x a=x^2

Age_Word_Problems/586913: A father's present age is five times as that of his son. In the next ten years, the father will be three times as old as his son. What is their respective ages? 1 solutions Answer 373941 by richwmiller(9143)   on 2012-03-14 17:46:48 (Show Source): You can put this solution on YOUR website! f=5s f+10=3*(s+10) f=50 s=10

Quadratic_Equations/586931: a rectangular pond is to be constructed in a park. the pond will be 5 feet by 7 feet and is to be surrounded by a sidewalk of x feet. the gardener is interested in the area the pond and sidewalk will encompass. write a representative function for the area of this region as a function of x. what kind of function is this? 1 solutions Answer 373940 by richwmiller(9143)   on 2012-03-14 17:44:50 (Show Source): You can put this solution on YOUR website! (5+x)*(7+x)

Equations/586925: can you help me solve thsi complete substition. I am get no solution and don't know if that is possible. 5y+15x=10 6x+2y=7 what does x and y equal 1 solutions Answer 373939 by richwmiller(9143)   on 2012-03-14 17:43:09 (Show Source): You can put this solution on YOUR website! No solution means they are parallel. They are parallel if they have the same slope.

Money_Word_Problems/586937: Walt made an extra $10,000 last years from a part-time job.he invested part of the money at 7%per year and the rest at 8% per year. He made a total of $740 in interest for the year. How much was invested at each rate? 1 solutions Answer 373938 by richwmiller(9143)   on 2012-03-14 17:41:16 (Show Source): You can put this solution on YOUR website! x+y=10000 .07x+.08y=740 x=6000 y=4000