Tutor:

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

---

Recent problems solved by 'Mathtut'

Mathtut answered: 3667 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, >>Next

Polynomials-and-rational-expressions/191634: i need to factor out this 6mn^4+18m^5n^2 1 solutions Answer 143770 by Mathtut(3670)   on 2009-04-16 23:56:28 (Show Source): You can put this solution on YOUR website!

Inverses/191635: please help me multiply this problem. -3xy(7x^2-8xy+9y^2) thanks 1 solutions Answer 143769 by Mathtut(3670)   on 2009-04-16 23:54:59 (Show Source): You can put this solution on YOUR website!

Miscellaneous_Word_Problems/191492: Anne buys a plant whose height is 6 cm. The plant is growing at a rate of 2/3 cm per week. When will its height exceed 10 2/3 cm? 1 solutions Answer 143768 by Mathtut(3670)   on 2009-04-16 23:49:20 (Show Source): You can put this solution on YOUR website! 6+(2/3)t>10 2/3.....where t is the number of weeks : (2/3)t>4 2/3......subtracting 6 from both sides : (2/3)t>14/3........coverting 4 and 2/3 to 14/3 : .....multiply both sides by 2/3 to isolate variable t : weeks

Equations/191501: James invested $4000 at 5% interest per year. How long will it take him to earn 200 dollars in simple interest. 1 solutions Answer 143767 by Mathtut(3670)   on 2009-04-16 23:44:30 (Show Source): You can put this solution on YOUR website! I=Prt : 200=4000(.05)t : 200=200t : t=1 year

Equations/191503: John pays $650 in property tax. What is the assesed value of his property if his property taxes are 1.2% of assessed value. 1 solutions Answer 143766 by Mathtut(3670)   on 2009-04-16 23:43:07 (Show Source): You can put this solution on YOUR website! let assessed value =A : A(.012)=650 : A=$54166.67....assessed value

Equations/191522: A=h(a+b)/2 solve for a 1 solutions Answer 143765 by Mathtut(3670)   on 2009-04-16 23:41:17 (Show Source): You can put this solution on YOUR website! : :

Equations/191523: P=A/1+rt solve for r 1 solutions Answer 143764 by Mathtut(3670)   on 2009-04-16 23:39:50 (Show Source): You can put this solution on YOUR website! : : :

Inverses/191631: please help me multiply problem. -5(16-9n) thank you Chris 1 solutions Answer 143763 by Mathtut(3670)   on 2009-04-16 23:37:18 (Show Source): You can put this solution on YOUR website! -80+45n

Polygons/191612: OK SO the question is ... FInd the measure of one of the exterior angles of a regular polygon with nine sides. What I tried was S=180(n-2) The steps I took was... S=180(7) I kept getting 1260. But that is not an anwser. So what is the set up to use, Both to find number of sides and the measure of certain number of sides?? 1 solutions Answer 143756 by Mathtut(3670)   on 2009-04-16 22:16:37 (Show Source): You can put this solution on YOUR website! exterior angles always add to 360 degrees...your are using an interior angle formula : 360/9=40 degrees

Polynomials-and-rational-expressions/191617: how do you factor out this polynomial. 24a^3-18a^2+12a 1 solutions Answer 143755 by Mathtut(3670)   on 2009-04-16 22:07:03 (Show Source): You can put this solution on YOUR website! : that is as far as this can be factored!!!

Expressions-with-variables/191595: This question is from textbook 2(x^2-6x+20)= x(x+1) 1 solutions Answer 143754 by Mathtut(3670)   on 2009-04-16 22:02:05 (Show Source): You can put this solution on YOUR website! : : : x=5 or 8

Polynomials-and-rational-expressions/191599: Factor each polynomial, if not possible write prime. I am having trouble with 18y^2-48y+32 1 solutions Answer 143748 by Mathtut(3670)   on 2009-04-16 21:12:38 (Show Source): You can put this solution on YOUR website! : :

Money_Word_Problems/191608: This question is from textbook I need help with this problem, I am taking elementary algebra in college. Jake borrowed $5000 from two different banks. One bank charges 7% simple interest, and other charges 8.5% simple interest. If the total interest payment is $380, how much did he borrow? 1 solutions Answer 143747 by Mathtut(3670)   on 2009-04-16 21:09:22 (Show Source): You can put this solution on YOUR website! let x and y be the amounts borrowed at 7% and 8.5 % interest respectively : x+y=5000..........eq1 .07x+.085y=380....eq 2 : rewrite eq 1 to x=5000-y and plug this value into eq 2 : .07(5000-y)+.085y=380 : 350-.07y+.085y=380 : .015y=30 : y=2000 dollars at 8.5% : x=5000-y=5000-2000=3000 dollars at 7%

percentage/191579: This question is from textbook Pre-Algebra 1 solutions Answer 143734 by Mathtut(3670)   on 2009-04-16 19:32:27 (Show Source): You can put this solution on YOUR website! Tutors have NO access to problems....please post actual problem...thanks Mathtut..........info you gave is for tracking purposes

Linear-systems/191534: Find the length and width of a rectangle lot with a perimeter of 70 meters if the length is 5 times more than the width. 1 solutions Answer 143733 by Mathtut(3670)   on 2009-04-16 19:31:22 (Show Source): You can put this solution on YOUR website! let L and W be the length and width : P=2L+2W......eq 1 L=5W.........eq 2 P=70.........eq 3 : Plug P's value from eq 3 and L's value from eq 2 into eq 1 : 70=2(5W)+2W : 70=10W+2W : 70=12W : W=70/12=35/6 m : L=5(35/6)=175/6 m

Equations/191540: i think of a certain number if i multiply it by 6 add (-18) to the product and take away one -third of the sum i will (-2) what is the number 1 solutions Answer 143732 by Mathtut(3670)   on 2009-04-16 19:26:13 (Show Source): You can put this solution on YOUR website! please restate problem......very confusing???thanks Mathtut

Quadratic-relations-and-conic-sections/191572: find the standard form of the ellipse 4x^2+y^2-8x-2y-4=0 1 solutions Answer 143731 by Mathtut(3670)   on 2009-04-16 19:23:40 (Show Source): You can put this solution on YOUR website! 4x^2+y^2-8x-2y-4=0 : : :

Proportions/191458: Find the product (2x+1)(x-1) 1 solutions Answer 143697 by Mathtut(3670)   on 2009-04-16 12:35:51 (Show Source): You can put this solution on YOUR website!

Exponential-and-logarithmic-functions/191460: factor completely x^4-16 1 solutions Answer 143696 by Mathtut(3670)   on 2009-04-16 12:34:15 (Show Source): You can put this solution on YOUR website! : :

Polynomials-and-rational-expressions/191489: Factor the trinomial completely -9x+20+x^2 1 solutions Answer 143695 by Mathtut(3670)   on 2009-04-16 12:32:35 (Show Source): You can put this solution on YOUR website! :

Equations/191480: Can you please help me with this one? Solve by substitution. Determine if the equation is dependent, independent or inconsistant. y = -3x + 19 y = 2x -1 I'm not sure if I'm doing this right. 1 solutions Answer 143694 by Mathtut(3670)   on 2009-04-16 12:31:25 (Show Source): You can put this solution on YOUR website! y = -3x + 19.........eq 1 y = 2x -1............eq 2 : take the value of y from eq 2 and plug it into eq 1 : 2x-1=-3x+19 : 5x=20 : x=4 : now take x's found value and plug it into either equationa and solve for y. I will use eq 2 : y=2(4)-1=7 : (4,7) is the solution meaning this is a consistent and independent system since the is one a only one solution

Geometry_Word_Problems/191413: A square has a side measuring 30 inches. Find the diagonal 1 solutions Answer 143642 by Mathtut(3670)   on 2009-04-16 00:10:43 (Show Source): You can put this solution on YOUR website! : : c=42.43 inches

Linear-equations/191390: This question is from textbook MCDOUGAL LITTELL PRE-ALGEBRA 1 solutions Answer 143632 by Mathtut(3670)   on 2009-04-15 21:51:22 (Show Source): You can put this solution on YOUR website! tutors have NO access to problems.....please submit actual problem...thanks Mathtut

Exponents/191352: square root of x to the fourth multilpied by square root of x to the 5th 1 solutions Answer 143623 by Mathtut(3670)   on 2009-04-15 21:17:15 (Show Source): You can put this solution on YOUR website!

Functions/191358: state the domain: g(x)= 5x / x^2 + 25 1 solutions Answer 143622 by Mathtut(3670)   on 2009-04-15 21:15:05 (Show Source): You can put this solution on YOUR website! denominator cannot be zero : x=5 or -5 : so domain is all x such that x is not equal to 5 or -5

Functions/191357: Hi tutor, Here are my headaches. State the domain. m(x)= 5x -7 1 solutions Answer 143620 by Mathtut(3670)   on 2009-04-15 20:54:19 (Show Source): You can put this solution on YOUR website! Domain is all Real numbers........no restrictions

Functions/191362: State the domain: k(x) = 3x-3 / x + 2 1 solutions Answer 143619 by Mathtut(3670)   on 2009-04-15 20:53:02 (Show Source): You can put this solution on YOUR website! all x such that x is not equal to -2 : the denominator cannot equal zero x+2=0--->x=-2

Surface-area/191373: This question is from textbook discovering geometry find the radius of a cicle whose circumference is 12 cm. 1 solutions Answer 143616 by Mathtut(3670)   on 2009-04-15 20:46:45 (Show Source): You can put this solution on YOUR website! C= : : : r=1.96 cm

Equations/191301: A village lost 14% of its goats in a flood and 6% of the remainder from disease. Given that the number of goats left is X 8,084, Find the original number of goats before the floods . 1 solutions Answer 143591 by Mathtut(3670)   on 2009-04-15 18:06:55 (Show Source): You can put this solution on YOUR website! let g be the orginal amount of goats : g-.14g-.06(.86g)=8084 : .86g-.0516g=8084 : .8084g=8084 : g=10000 goats

Parallelograms/191322: a parallelogram with opposite sides that are equal, or congruent, and with four right angles 1 solutions Answer 143589 by Mathtut(3670)   on 2009-04-15 18:01:55 (Show Source): You can put this solution on YOUR website! is there a question on this??? thanks Mathtut

Polynomials-and-rational-expressions/191284: Factor completely, use grouping. 12y^2-27y+15 1 solutions Answer 143565 by Mathtut(3670)   on 2009-04-15 15:02:14 (Show Source): You can put this solution on YOUR website! : :