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# Recent problems solved by 'tran3209'

 Linear-systems/176008: Solve the system by substitution. y=2x+4 y=-1/2x+3/21 solutions Answer 131119 by tran3209(100)   on 2009-01-11 13:37:15 (Show Source): You can put this solution on YOUR website! multiply both sides by 2 add x to both sides and subtract both sides by 8
 Inequalities/175984: This question is from textbook Algebra I hi could u help me with this problem please...im searching for x 3x-10< 91 solutions Answer 131114 by tran3209(100)   on 2009-01-11 13:29:49 (Show Source):
 Linear-equations/175987: This question is from textbook Solve the equation: -8.2n= -421 solutions Answer 131112 by tran3209(100)   on 2009-01-11 13:26:38 (Show Source): You can put this solution on YOUR website! divide both sides by -8.2
 Linear-systems/175994: Find the values of x and y that solve the following system of equations. -7x+9y=-12 -6x+5y=61 solutions Answer 131110 by tran3209(100)   on 2009-01-11 13:22:47 (Show Source):
 Linear-systems/175991: Find the values of x and y that solve the following system of equations. -5x+3y=8 -9x+5y=141 solutions Answer 131106 by tran3209(100)   on 2009-01-11 13:08:33 (Show Source): You can put this solution on YOUR website!First Step. -Isolate one variable for either equation. add 5x to both sides divide both sides by 3 Second Step. -Plug in isolated variable into second equation. "foil" or multiply the second term use common denomenator of 3. multiply combine like terms and simplify subtract 40 from both sides divide both sides by -2 and simplify
 Complex_Numbers/71550: Write the expressions as a complex number in standard form a) 4i(6-i) b) (5+i)(8+i) c) (2-9i)(9-6i) d) (3+10i)^21 solutions Answer 52431 by tran3209(100)   on 2007-03-04 17:09:27 (Show Source): You can put this solution on YOUR website!a. b. c. d.
 Complex_Numbers/71507: My question is to solve the equation ------7 over negative 2i 1 solutions Answer 51980 by tran3209(100)   on 2007-02-28 18:26:22 (Show Source):
 Proportions/19935: a fly wheel has 72 teeth and a starter drivegear has 15 teeth. Find the ratio of fly wheel teeth to drive gear teeth.1 solutions Answer 46624 by tran3209(100)   on 2007-01-01 17:40:33 (Show Source): You can put this solution on YOUR website!72 Fly Wheel Teeth 15 Drive Gear Teeth 72:15 or 72/15 Simplify by 3 24/5 The ratio of fly wheel teeth to drive gear teeth is 24: 5
 Proportions/25975: 4 pencils and 2 pens cost \$1.08 6 pencils and 5 pens cost \$2.22 find the cost of each pen and pencil 1 solutions Answer 46623 by tran3209(100)   on 2007-01-01 17:33:53 (Show Source): You can put this solution on YOUR website!First you can find the cost of each pen using the given information: 5 pens cost \$2.22. = So now we know each pen cost \$0.44. Now since they purchased 4 pencils and 2 pens and recieved a total of \$1.08, we will find the cost of each pencil. Suppose the cost of pencils is "x". The 2(0.44) is the cost of 2 pens @ \$0.44 each. <---- Subtract 0.88 from each side. The Answer: (1) Pen cost \$0.88 (1) Pencil cost \$0.05
 Equations/61355: 3/4n + 5 = 2/5n1 solutions Answer 43478 by tran3209(100)   on 2006-11-24 15:17:48 (Show Source): You can put this solution on YOUR website! <-- Multiply each side by 5 <-- Subtract 25 from both sides <-- Subtract 2n from both sides <-- Divide each side by 13
 logarithm/36009: I'm not sure how to write this problem as a single logarithm and simplify it, if possible. 3log5^2-2log5^31 solutions Answer 27794 by tran3209(100)   on 2006-06-18 21:14:00 (Show Source): You can put this solution on YOUR website!3log5^2-2log5^3 log5^6-log5^6 log(5^6/5^6) log1=0
 logarithm/41643: 2log(x-5)=log91 solutions Answer 27765 by tran3209(100)   on 2006-06-18 20:02:37 (Show Source): You can put this solution on YOUR website!2log(x-5)=log9 log(x-5)^2=log9 (x-5)^2=9 x^2-10x+25=9 x^2-10x+25-9=9-9 x^2-10x+16=0 (x-8)(x-2)=0 x-8=0--->x=8 x-2=0--->x=2 the answers are x=8 and x=2
 Inequalities/42623: This question is from textbook Intermediate Algebra Solve: 5[3(7-t)-4(8+2t)]-20 <= -6[2(6+3t)-4]1 solutions Answer 27764 by tran3209(100)   on 2006-06-18 19:04:26 (Show Source):
 Equations/42643: problem 7 i need help on thank you .. x/6 + 3 = 91 solutions Answer 27748 by tran3209(100)   on 2006-06-18 16:23:18 (Show Source): You can put this solution on YOUR website!x/6 + 3 = 9 x/6 +3-3=9-3 x/6=6 (x/6) (6)=(6)(6) X=36 The answer is x=36
 Average/42650: I got this wrong.. :( 1 solutions Answer 27745 by tran3209(100)   on 2006-06-18 16:17:08 (Show Source): You can put this solution on YOUR website!X must be lesser than -4. The answer is B
 Equations/42652: Which label describes the following? 3x + 6 = 10 A) Linear equation B) Equation which is not linear C) Expression Isn't it B! 1 solutions Answer 27742 by tran3209(100)   on 2006-06-18 16:13:38 (Show Source): You can put this solution on YOUR website!3x+6=10 3x=10-6 3x=4 x=4/3 This is a linear equation of a line perpendicular to axis of x at the point (+4/3 0) The answer is A
 Linear-equations/42658: This question is from textbook INTERMEDIATE ALGEBRA Factor completely: 9x2 – 36y2 1 solutions Answer 27739 by tran3209(100)   on 2006-06-18 16:07:22 (Show Source): You can put this solution on YOUR website!9x^2-36y^2 9(x^2-4y^2) 9(x^2-2^2y^2) 9[x^2-(2y)^2] Apply the formula A^2-B^2 = (A+B)(A-B) 9(x+2y)(x-2y)
 Equations/41540: I need to graph the following equation. y=3/4x+2 Please I need help badly. Thanks1 solutions Answer 27002 by tran3209(100)   on 2006-06-12 19:17:41 (Show Source): You can put this solution on YOUR website!First of all we need to pick a value for x. X|Y _____ 0|2 4|5 If we suppose x is equal to 0 then the equation would look like: If we suppose x is equal to 4 then the equation would look like this: Now we have 2 points so we can draw the line.
 Equations/41651: Write the equasion of a line with slope -3 and Y intercept -71 solutions Answer 26993 by tran3209(100)   on 2006-06-12 16:46:04 (Show Source): You can put this solution on YOUR website!Did you need the answer in slope intercept form? The formula to write a line in slope intercept form is: y = mx + b y=-3x-7
 Equations/41598: 4x^5+10x^4-16x^2 divide by 4x^2 show work1 solutions Answer 26884 by tran3209(100)   on 2006-06-10 22:22:36 (Show Source): You can put this solution on YOUR website!4x^5+10x^4-16X^2/4X^2 2X^2(2X^3+5x^2-8)/4X^2 simplify by 2X^2 (2X^3+5X^2-8)/2
 Equations/41456: division 4x^5+10x^4-16x divide by 4x^2 having problems please show work1 solutions Answer 26810 by tran3209(100)   on 2006-06-10 06:58:59 (Show Source): You can put this solution on YOUR website!4x^5+10x^4-16x/4x^2 2x(2x^4+5x^3-8)/4X^2 simplify by 2x 2x^4+5x^3-8/2x
 Polynomials-and-rational-expressions/41474: (8y^2-2y-3) - (9y^2-7y-1) show work1 solutions Answer 26809 by tran3209(100)   on 2006-06-10 06:46:11 (Show Source): You can put this solution on YOUR website!(8y^2-2y-3)-(9y^2-7y-1) 8y^2-2y-3-9y^2+7y+1 -y^2+5y-2
 Equations/41487: This question is from textbook Algebra and Trigonometry with Analytic Geometry Simplify the expression: 1/x-1/b over 1/xb+1/21 solutions Answer 26808 by tran3209(100)   on 2006-06-10 06:38:44 (Show Source): You can put this solution on YOUR website!1/x-1/b over 1/xb+1/2 let simplify 1/x-1/b---> (1/x-1)(1/b)--->1/b(x-1) let simplify 1/xb+1/2--->(1/xb+1)(1/2)--->1/2(xb+1) let put them together and simplify : 1/b(x-1) over 1/2(xb+1)----> [1/b(x-1)][ 2(xb+1)/1]--->2(xb+1)/b(x-1) The answer is 2(xb+1)/b(x-1)
 Graphs/39419: Y=2x-3 Y=x2+3 Y=3x 1 solutions Answer 26778 by tran3209(100)   on 2006-06-09 20:55:16 (Show Source): You can put this solution on YOUR website!y=2x+3 This is an equation of a line We need to find 2 points to draw the line. Find The y intercept and x intercept if x is 0 y = 3 y=3 is the y intercept if y is 0 x= -3/2 x=-3/2 is the x intercept By joining the 2 points together you will find the line y=x^2 + 3 This is an equation of a parabola. y=ax^2+bx+c Here a=1 b=0 c=3 a=1>0 the parabola opens upwards The coordinates of the minimum point are x=-b/2a = 0/2 =0 y(0)=0^2+3 y = 3 we need 2 more points to draw the parabola. x=1 y=-4 x=-1 y = 4 Join the tree points together and you see the parabola y=3x This is the equation of a line that passes through the point O of the axis y=ax We need 1 more point to draw the line x=1 y=3 Join point O and this point (x=1 y=3) we have the line.
 Geometric_formulas/27160: Mount Everest is the tallest mountain in the world. It is 237 meters higher than K2the second talest mountain. If the sum of their heights is 17,459 meters how tal is each mountain? How do I write the formula for this?1 solutions Answer 26775 by tran3209(100)   on 2006-06-09 19:47:35 (Show Source): You can put this solution on YOUR website!Suppose that x is the height of K2 Then that makes Mt.Everest is x+237 Then you can put together a simple formula to solve for x The height of K2 is 8,611 feet The height of Mt.Everest is (8611 + 237) or 8848 feet
 expressions/16914: Evaluate each expression 9 cubed1 solutions Answer 26772 by tran3209(100)   on 2006-06-09 19:31:54 (Show Source): You can put this solution on YOUR website! The final answer is 729
 expressions/18643: [(5n-4)+(3n-7n)]-11 solutions Answer 26771 by tran3209(100)   on 2006-06-09 19:29:57 (Show Source):
 expressions/20767: p=3.47,q=0.28,r=11.9 2p/q+r=1 solutions Answer 26759 by tran3209(100)   on 2006-06-09 12:04:45 (Show Source): You can put this solution on YOUR website! Plug in the numbers to the corresponding varriables The answer is approximately 0.5698
 expressions/25212: 2a+3a-11.4=6.81 solutions Answer 26757 by tran3209(100)   on 2006-06-09 11:57:09 (Show Source):
 expressions/41457: (x^2+2)^2 please help show work1 solutions Answer 26756 by tran3209(100)   on 2006-06-09 11:53:29 (Show Source): You can put this solution on YOUR website! Combine like terms Simplify
 expressions/41458: a+7-2a=14+7a-10 show work1 solutions Answer 26753 by tran3209(100)   on 2006-06-09 11:45:10 (Show Source): You can put this solution on YOUR website! Combine like terms Subtract 7 from both sides Subtract 7a from both sides Divide both sides by -8