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# Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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 Graphs/359120: Write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y+mx+b (5,7); x+6y=5 The equation of the line is y= I am not even sure where to start with this one. I can move the -x both sides of x +6y=5 to get 6y=-x+5, but then where do I go? Thank you for your help!!!1 solutions Answer 256282 by Alan3354(30993)   on 2010-10-20 12:18:44 (Show Source): You can put this solution on YOUR website!Here's an example. Email me if you like. -------------------- A line and a point example. Write in standard form the eqation of a line that satisfies the given conditions. Perpendicular to 9x+3y=36, through (1,2) ----------------- Find the slope of the line. Do that by putting the equation in slope-intercept form, y = mx + b. That means solve for y. 9x+3y = 36 3y= - 9x + 36 y = -3x + 12 The slope, m = -3 ------------------ The slope of lines parallel is the same. The slope of lines perpendicular is the negative inverse, m = +1/3 ---------------- Use y = mx + b and the point (1,2) to find b. 2 = (1/3)*1 + b b = 5/3 The equation is y = (1/3)x + 5/3 (slope-intercept form) x - 3y = -5 (standard form) ------------------------ For further assistance, or to check your work, email me via the thank you note, or at Moral Loophole@aol.com
 Graphs/358929: solve by graphing if no solutin or infinite number, so state for the following: 2x -y = 8, and y = x + 4. I find no solution. 1 solutions Answer 256097 by Alan3354(30993)   on 2010-10-19 22:57:57 (Show Source): You can put this solution on YOUR website!The slopes are different --> 1 solution.
 test/358871: The sum of two numbers is 24. The second number is 3 times the first. Write a system of equations that represents the above info. Solve using the elimination and subsition method1 solutions Answer 256072 by Alan3354(30993)   on 2010-10-19 21:29:08 (Show Source): You can put this solution on YOUR website!x = 1st number y = 2nd -------- x + y = 24 y = 3x Sub for y x + 3x = 24 4x = 24 x = 6 3x = 18 --> 6 & 18
 Equations/358843: I am having a hard time on how to start solving this problem. It was one of my extra credit problems on my exam and I can't stop thinking about it! f(x)= 2x-3 g(x)= x2+1 (the x is squared) Solve f/g So I set the equation . . . . . (2x-3)/(x2+1) Where do you go from here? Can you please show me the steps to solve this equation?1 solutions Answer 256070 by Alan3354(30993)   on 2010-10-19 21:22:02 (Show Source): You can put this solution on YOUR website!f(x)= 2x-3 g(x)= x^2+1 Solve f/g (not solve, but find or calculate.) So I set the equation (2x-3)/(x^2+1) That's not an equation, there's no equal sign. ------------------- Where do you go from here? Nowhere, that's all that can be done. --------------- Can you please show me the steps to solve this equation? It's not an equation, so there's nothing to solve. You're done.
 Quadratic_Equations/358867: Solve If a pine cone falls from the top of a 96 foot tree, then how long does it take to reach the earth?1 solutions Answer 256067 by Alan3354(30993)   on 2010-10-19 21:17:27 (Show Source): You can put this solution on YOUR website!If a pine cone falls from the top of a 96 foot tree, then how long does it take to reach the earth? --------------- Neglecting air friction and using 32 ft/sec/sec as the gravity acceleration: t^2 = 6 t =~ 2.45 seconds
 logarithm/358864: f(x)=logx if x=715 round to 3 decimal places.1 solutions Answer 256065 by Alan3354(30993)   on 2010-10-19 21:14:29 (Show Source): You can put this solution on YOUR website!log(715) =~ 2.854 Do you have a calculator?
 Triangles/358570: right triangle is 50 meters long and one side is 30 meters long. what is the remaining side?1 solutions Answer 256060 by Alan3354(30993)   on 2010-10-19 20:59:51 (Show Source): You can put this solution on YOUR website!right triangle is 50 meters long and one side is 30 meters long. what is the remaining side? ---------------- "right triangle is 50 meters long" makes no sense. --------------- If 50 is the hypotenuse: b = 40 meters -------- If 50 is not the hypotenuse: c =~ 58.31 meters
 Distributive-associative-commutative-properties/358772: how do i solve -25+4(2x+5)=-611 solutions Answer 256059 by Alan3354(30993)   on 2010-10-19 20:55:49 (Show Source): You can put this solution on YOUR website!-25+4(2x+5)=-61 -25 + 8x+20 = -61 -5 + 8x = -61 8x = -56 x = -7
 decimal-numbers/358809: Write expression as a decimal - Nine hundred ten thousandths1 solutions Answer 256058 by Alan3354(30993)   on 2010-10-19 20:53:59 (Show Source): You can put this solution on YOUR website!If the - means minus: = - 0.910
 absolute-value/358782: Please help with this problem!!!!!!! |3d-7|>281 solutions Answer 256056 by Alan3354(30993)   on 2010-10-19 20:52:06 (Show Source): You can put this solution on YOUR website!Please help with this problem!!!!!!! |3d-7|>28 ------------ Help do what? If you want to solve for d, you should say, "Solve for d", not "help..." ------------ Case 1: 3d-7 > 28 3d > 35 d > 35/3 -------- Case 2, the negative: 7-3d > 28 -3d > 21 d < -3
 Distributive-associative-commutative-properties/358765: how do i solve -20-(4x-1)=-151 solutions Answer 256054 by Alan3354(30993)   on 2010-10-19 20:48:24 (Show Source): You can put this solution on YOUR website!how do i solve -20-(4x-1)=-15 Eliminate the parentheses -20 -4x+1 = -15 Add 20 -4x+1 = 5 Subtract 1 -4x = 4 x = -1
 logarithm/358799: log(base3)(81xy)^8. I have to write it out. so far i have: 8log(base3)x+ 8log(base3)+ 8log(base3)81. is this correct?1 solutions Answer 256050 by Alan3354(30993)   on 2010-10-19 20:42:39 (Show Source): You can put this solution on YOUR website!log(base3)(81xy)^8. I have to write it out. so far i have: 8log(base3)x+ 8log(base3)+ 8log(base3)81. is this correct? ------------ log(base3)(81xy)^8 = = = ----------------------- Your answer was correct except you left out the y, and you didn't use the fact that 81 = 3^4. ----------- Use log(3,x) with the 3 braces { } for legibility.
 Distributive-associative-commutative-properties/358775: how do is solve 187=19+7(13-x)1 solutions Answer 256024 by Alan3354(30993)   on 2010-10-19 19:21:46 (Show Source): You can put this solution on YOUR website!187=19+7(13-x) ----------- Subtract 19 Then divide by -7 Then add 13
 Numeric_Fractions/358774: what is 16-5+4 divided (9-8) = n1 solutions Answer 256023 by Alan3354(30993)   on 2010-10-19 19:19:52 (Show Source): You can put this solution on YOUR website!It's an equation in one variable, n.
 Inequalities/358770: what is the answer to x-0.75 greater than -121 solutions Answer 256022 by Alan3354(30993)   on 2010-10-19 19:19:17 (Show Source): You can put this solution on YOUR website!what is the answer to x-0.75 greater than -12 ------------- What is the question? ---------
 Triangles/358749: Can this be solved? I think the question is worded wrong or is a misprint, please help. An isosceles triangle with sides AB and BC congruent has the following lengths: AB= x+7, AC = 3x-5 Solve for x and the length of all three sides. 1 solutions Answer 256021 by Alan3354(30993)   on 2010-10-19 19:16:29 (Show Source): You can put this solution on YOUR website!An isosceles triangle with sides AB and BC congruent has the following lengths: AB= x+7, AC = 3x-5 Solve for x and the length of all three sides. ------------------ BC = AB = x+7 Nothing else can be determined.
 Equations/358703: Hello, I have a problem, I'm not sure about it how to solve 4=32/b, I think so 4b=32 b=32/4=8 Please help me 1 solutions Answer 256010 by Alan3354(30993)   on 2010-10-19 18:18:29 (Show Source): You can put this solution on YOUR website!b=8 is right.
 Expressions-with-variables/358683: find the missing coorinate of ( ,3) that is a solution to the equation y=-5+21 solutions Answer 256008 by Alan3354(30993)   on 2010-10-19 18:17:08 (Show Source): You can put this solution on YOUR website!find the missing coorinate of ( ,3) that is a solution to the equation y=-5+2 y = -5+2 --> y = -3 ------------ ???
 Distributive-associative-commutative-properties/358680: hi 1 solutions Answer 256000 by Alan3354(30993)   on 2010-10-19 17:57:45 (Show Source): You can put this solution on YOUR website!Howdy
 Expressions-with-variables/358693: My son has a problem and i need to know how to do it so i can help. 8x+2=3x+11 solutions Answer 255998 by Alan3354(30993)   on 2010-10-19 17:56:19 (Show Source): You can put this solution on YOUR website!Get all the x's on one side. 8x+2 = 3x+1 Subtract 3x from both sides 5x+2 = 1 Subtract 2 from both sides 5x = -1 Divide by 5 x = -1/5
 Polynomials-and-rational-expressions/358619: Please show me in detail, i am completely lost Factor completely 1 solutions Answer 255947 by Alan3354(30993)   on 2010-10-19 16:14:51 (Show Source): You can put this solution on YOUR website! = The 1st and last terms are squares, so try that first. = Not many steps involved.
 Travel_Word_Problems/358590: A family takes a car trip. They travel for an hour at 90 km/h and then for two hours at 40km/h Find their average speed during the trip 1 solutions Answer 255937 by Alan3354(30993)   on 2010-10-19 16:02:52 (Show Source): You can put this solution on YOUR website!Find the total distance. Divide that by the total time.
 Travel_Word_Problems/358568: With the aid of the current, Joe can row a canoe 3 miles in 12 minutes. Against the current he requires 18 minutes to row the same distance. How fast does Joe row in still water and how fast is the current?1 solutions Answer 255935 by Alan3354(30993)   on 2010-10-19 15:57:25 (Show Source): You can put this solution on YOUR website!With the aid of the current, Joe can row a canoe 3 miles in 12 minutes. Against the current he requires 18 minutes to row the same distance. How fast does Joe row in still water and how fast is the current? -------------- 3 miles in 12 minutes = 15 mph 3 miles in 18 minutes = 10 mph His rowing speed is the average = (15+10)/2 = 12.5 mph The current speed is the difference = 15 - 12.5 = 2.5 mph
 Permutations/358566: How many different arrangements of 9 letters can be formed if the first letter must be W or K (repeats of letters are allowed)?1 solutions Answer 255933 by Alan3354(30993)   on 2010-10-19 15:55:36 (Show Source): You can put this solution on YOUR website!How many different arrangements of 9 letters can be formed if the first letter must be W or K (repeats of letters are allowed)? ------------------------ Assuming you mean 26 letters of the alphabet, and not case sensitive: The first letter is 1 of 2 The 2nd is 1 of 26 The 3rd is 1 of 26 . . . The 9th is 1 of 26 --> 2*26^8 =~ 4.1765E11
 Numeric_Fractions/358539: Factor x2 21x 1001 solutions Answer 255903 by Alan3354(30993)   on 2010-10-19 15:02:46 (Show Source): You can put this solution on YOUR website!You need + or minus signs between terms. Also, use x^2 for x squared.
 Linear_Algebra/358553: Find the equation of the parabola passing through the given points (1,3)(2,3)(3,5). Show the system of equations containing the 3 points and then solve for the constants, a,b,and c. Then, show the standard form equation of the parabola. 1 solutions Answer 255902 by Alan3354(30993)   on 2010-10-19 14:51:34 (Show Source):
 Polynomials-and-rational-expressions/358561: Solve 1 solutions Answer 255896 by Alan3354(30993)   on 2010-10-19 14:41:06 (Show Source): You can put this solution on YOUR website! 2x^2 = 3 -------- 3x^2 = 5 -------- Can you finish it?
 Radicals/358464: Why does not have a real solution?1 solutions Answer 255846 by Alan3354(30993)   on 2010-10-19 11:54:01 (Show Source): You can put this solution on YOUR website!Why does not have a real solution? ---------------- Square both sides 3x = 36 x = 12 ------ Check: = +6, -6
 Radicals/358488: I need to solve......144x^2 + 64 = 0....I do not even remember where to begin. 1 solutions Answer 255845 by Alan3354(30993)   on 2010-10-19 11:49:48 (Show Source): You can put this solution on YOUR website!144x^2 + 64 = 0 9x^2 + 4 = 0 9x^2 = -4 x^2 = -4/9 x = ± 2i/3 (i = sqrt(-1) )
 Equations/358414: Can you help me find the answer to an assignment for graphing fuctions?1 solutions Answer 255802 by Alan3354(30993)   on 2010-10-19 08:16:06 (Show Source): You can put this solution on YOUR website!Probably.
 Systems-of-equations/358415: Can I see all downloaded graph used to find function problems?1 solutions Answer 255799 by Alan3354(30993)   on 2010-10-19 08:04:31 (Show Source): You can put this solution on YOUR website!I don't see how that's possible.