# See tutors' answers!

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 'fazlerabbi'

fazlerabbi answered: 9 problems
 Numeric_Fractions/45687: Can someone help me on this? I need to add: 1/3 + 1/5 + 1/10 thanks, Lyn1 solutions Answer 30376 by fazlerabbi(9)   on 2006-07-13 14:00:50 (Show Source): You can put this solution on YOUR website! 1/3 + 1/5 + 1/10 = (1/3)(30/30) + (1/5)(30/30) + (1/10)(30/30) = 10/30 + 6/30 + 3/30 = (10 + 6 + 3)/30 = 19/30 Answer is 19/30
 Numeric_Fractions/45727: Can someone help me on this? I need to write this fraction as a percent. 7/8 Thanks, Ashley1 solutions Answer 30375 by fazlerabbi(9)   on 2006-07-13 13:49:23 (Show Source): You can put this solution on YOUR website! 7/8 of 100 = (7/8)*100 = 700/8 = 87.5 percent.
 decimal-numbers/45725: cAN SOMEONE HELP ME ON THIS PROBLEM? I need to write as decimals: 160% Thank you, Ashley1 solutions Answer 30374 by fazlerabbi(9)   on 2006-07-13 13:42:22 (Show Source): You can put this solution on YOUR website! 160% = 160/100 = 1.6 Answer is 1.6
 Equations/45738: substitution method y=13-3x 2x+9y=-81 solutions Answer 30373 by fazlerabbi(9)   on 2006-07-13 13:38:51 (Show Source): You can put this solution on YOUR website!Given, y = 13 - 3x ----- (1) 2x + 9y = -8 ----- (2) Substituting value of y in (2) from (1) we get 2x+9(13-3x) = -8 => 2x+117-27x = -8 => 117-25x = -8 => 117-25x-117 = -8-117 ;(adding -117 to both sides) => -25x = -125 => x = 5 ;(multiplying both sides by 1/-25) Substituting the value of x in (1) we get y = 13 - 3(5) =>y = 13 - 15 =>y = -2 So, Answer is x=5, y=-2
 Polynomials-and-rational-expressions/40375: Evaluate. 4^01 solutions Answer 25782 by fazlerabbi(9)   on 2006-06-02 05:31:41 (Show Source): You can put this solution on YOUR website!Anything raised to power 0 is 1. so, 4^0 = 1
 Polynomials-and-rational-expressions/40402: \$600 is borrowed at an interest rate of 1.4% per month. Find the interest for a 30 month period. \$_____ ---is it \$18000??? thank u very much1 solutions Answer 25781 by fazlerabbi(9)   on 2006-06-02 05:26:04 (Show Source): You can put this solution on YOUR website!principle amount p = 600 interest rate r = 1.4% = 0.014 time t = 30 So total interest after 30 months = p*r*t = 600 * 0.014 * 30 = 252 dollars. Ans.
 Polynomials-and-rational-expressions/40409: Company X can install chairs in a theater in 10 hours. Company Y can install them in 15 hours. How long would it take the two companies, working together to install the chairs. ______hours. Thanks1 solutions Answer 25780 by fazlerabbi(9)   on 2006-06-02 05:18:05 (Show Source): You can put this solution on YOUR website!X can install chairs in 10 hrs. So, in 1 hour X performs 1/10 part of the work. Y can install chairs in 15 hrs. So, in 1 hour Y performs 1/15 part of the work. X and Y together in 1 hour perform (1/10 + 1/15) = 1/6 part of the work. 1/6 part of the work is done in 1 hour So, 1 (whole) work is done in 6 hours.
 Equations/40423: Can someone help please? Can these equations be solved? w + x + y + z = 60 w = 1/2(x + y +z) x = 1/3(w + y+ z) y = 1/4(w + x + z) Thanks geocee1 solutions Answer 25779 by fazlerabbi(9)   on 2006-06-02 05:09:16 (Show Source): You can put this solution on YOUR website!Given, w+x+y+z = 60 => 1/2(x+y+z)+(x+y+z) = 60 ;[As w = 1/2(x+y+z)] => 3/2(x+y+z) = 60 => x+y+z = 40 ;[multiplying both sides by 2/3] Again w+x+y+z = 60 => w+40 = 60 ;[because x+y+z=40] => w = 20 ;[subtracting 40 from both sides] Given w+x+y+z = 60 => (w+y+z)+1/3(w+y+z) = 60 ;[given x=1/3(w+y+z)] => 4/3(w+y+z) = 60 => w+y+z = 45 ;[multiplying both sides by 3/4] Again w+x+y+z = 60 => x+45 = 60 ;[because w+y+z = 45] => x = 15 ;[subtracting 45 from both sides] Given w+x+y+z = 60 => (w+x+z)+1/4(w+x+z) = 60 ;[given y=1/4(w+x+z)] => 5/4(w+x+z) = 60 => w+x+z = 48 ;[multiplying both sides by 4/5] Again w+x+y+z = 60 => y+48 = 60 ;[because w+x+z = 48] => y = 12 ;[subtracting 48 from both sides] We know, w+x+y+z = 60 => 20+15+12+z = 60 ;[as w=20, x=15, y=12] => z = 13 The solution is: w=20, x=15, y=12 and z=13
 Inequalities/40422: -2x^2+7x-10<=(-3)x+2 Possible answers a. (-inf,-3) U (-2,+inf) b. (-inf,2) U (3, inf) c. (-3,-2) d. (2,3)1 solutions Answer 25778 by fazlerabbi(9)   on 2006-06-02 04:49:32 (Show Source): You can put this solution on YOUR website! given subtracted (-3)*x from both sides multiplied both sides by 1/2 subtracted 1 from both sides multiplied both sided by -1 Factoring left side yields (x-3)(x-2) >= 0 The values of x for which x-2=0 or x-3=0 are x=2 and x=5. These points divide the coordinate line into three intervals, (-inf,2], (2,3) and [3, +inf) We need to check points of which of these three intervals give positive sign for the product (x-3(x-2). We shall choose arbitrary points on each of these intervals to determine the sign; these points are called test points. Lets say 1, 2.5 and 4 will be the test points for intervals (-inf,2], (2,3) and [3, +inf) respectively. For interval (-inf,2] with test point 1 sign of (x-2)(x-3) is (-)(-) = + For interval (2,3) with test point 2.5 sign of (x-2(x-3) is (+)(-) = - For interval [3,+inf)with test point 4 sign of (x-2(x-3) is (+)(+) = + The pattern of signs suggest that the solution set is (-inf,2] U [3,+inf)