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# Recent problems solved by 'Alan3354'

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 Exponential-and-logarithmic-functions/597836: lnx=101 solutions Answer 378361 by Alan3354(31538)   on 2012-04-11 19:11:29 (Show Source): You can put this solution on YOUR website!lnx=10 --------- Thx for letting us know. Do you have a question?
 Exponential-and-logarithmic-functions/597832: What is the x-intercept of the function y = log2 (x − 5)? 1 solutions Answer 378360 by Alan3354(31538)   on 2012-04-11 19:10:46 (Show Source): You can put this solution on YOUR website!What is the x-intercept of the function y = log2 (x − 5)? ---------- Is that log squared? Log base 2? 2 times the log? ----------------- You can't make up your own symbol method and expect others to understand it.
 Exponential-and-logarithmic-functions/597833: ln/x+7=1 1 solutions Answer 378359 by Alan3354(31538)   on 2012-04-11 19:08:35 (Show Source): You can put this solution on YOUR website!ln/x+7=1 ----------- What does ln/x+7 mean?
 Volume/597820: If the radius is 6 and the volume is 8595.4 cubic centimeters, how do you find the length of a cylinder? e-mail: ky_taylor2002@yahoo.com1 solutions Answer 378358 by Alan3354(31538)   on 2012-04-11 19:05:52 (Show Source): You can put this solution on YOUR website!If the radius is 6 and the volume is 8595.4 cubic centimeters, how do you find the length of a cylinder? -------------- h is the height, or length ------------------- Solve for h
 Linear_Algebra/597802: What is the value of the expression 4x-2xy, when x=-1 and y=5? 1 solutions Answer 378351 by Alan3354(31538)   on 2012-04-11 18:54:24 (Show Source): You can put this solution on YOUR website!What is the value of the expression 4x-2xy, when x=-1 and y=5? --------- Sub -1 for x and 5 for y
 test/597817: Make tables of value for 3x-y=-21 solutions Answer 378349 by Alan3354(31538)   on 2012-04-11 18:52:55 (Show Source): You can put this solution on YOUR website!Make tables of value for 3x-y=-2 ---------- Solve for y y = 3x + 2 --- Pick values for x and find y ----------- I don't need the practice. You might.
 Linear-equations/597789: Use elimination to solve the system of equations for y. X-5y=-6 X+2Y=81 solutions Answer 378341 by Alan3354(31538)   on 2012-04-11 18:42:04 (Show Source): You can put this solution on YOUR website!Use elimination to solve the system of equations for y. X-5y=-6 X+2Y=8 ---------- Subtract
 Polynomials-and-rational-expressions/597804: Completely factor the following expression: y^2-121z^2.1 solutions Answer 378340 by Alan3354(31538)   on 2012-04-11 18:39:09 (Show Source): You can put this solution on YOUR website!Completely factor the following expression: y^2-121z^2. --------- It's a difference of 2 squares.
 test/597786: How do u do 18w-10-6w=50?1 solutions Answer 378335 by Alan3354(31538)   on 2012-04-11 18:18:38 (Show Source): You can put this solution on YOUR website!How do u do 18w-10-6w=50? -------- Do what? Define "do."
 Percentage-and-ratio-word-problems/597784: A shirts cost 85 dollars how much will the shirt cost if it's 5 percent off?1 solutions Answer 378334 by Alan3354(31538)   on 2012-04-11 18:17:51 (Show Source): You can put this solution on YOUR website!A shirts cost 85 dollars how much will the shirt cost if it's 5 percent off? ---------- 5% off --> 95% of the price Cost = \$85*0.95
 Travel_Word_Problems/597602: How much time would it take to travel 1000 kilometres on road on a vehicle or a bike ? Please reply me as soon as possible 1 solutions Answer 378314 by Alan3354(31538)   on 2012-04-11 16:49:02 (Show Source): You can put this solution on YOUR website!How much time would it take to travel 1000 kilometres on road on a vehicle or a bike ? ----------- It depends on your speed. d = r*t t = d/r = 1000/r If you go 10 km/hr it'll take 100 hours If you go 100 km/hr it'll take 10 hours.
 Coordinate-system/597622: How to solve, 3x(6x-5) ?1 solutions Answer 378250 by Alan3354(31538)   on 2012-04-11 12:52:49 (Show Source): You can put this solution on YOUR website!How to solve, 3x(6x-5) ? ---------- There's no equal sign, so it's not an equation. Nothing to solve.
 Polygons/597623: what is the measure of a 5 sided equiangular polygon ?1 solutions Answer 378249 by Alan3354(31538)   on 2012-04-11 12:51:52 (Show Source): You can put this solution on YOUR website!what is the measure of a 5 sided equiangular polygon ? --------- The measure of what?
 Numbers_Word_Problems/597627: find 2 consecutive integers whose sum is 791 solutions Answer 378248 by Alan3354(31538)   on 2012-04-11 12:51:15 (Show Source): You can put this solution on YOUR website!find 2 consecutive integers whose sum is 79 --------- 79/2 = 39.5, the center --> 39 & 40
 Rectangles/597564: The perimeter of a rectangle is 72". You know the lenght is 8 times bigger than the width. What are the dimensions of the rectangle.1 solutions Answer 378240 by Alan3354(31538)   on 2012-04-11 10:58:21 (Show Source): You can put this solution on YOUR website!The perimeter of a rectangle is 72". You know the lenght is 8 times bigger than the width. What are the dimensions of the rectangle. ----------------- 8 times bigger is not the same as 8 times as big. ----- If it's 1 times bigger, or 100% bigger, is that the same size? If so, why say bigger?
 Rectangles/597562: The perimeter of a rectangle is 24cm. You know the lenght is 3 times bigger than the width. What are the dimensions of the rectangle?1 solutions Answer 378239 by Alan3354(31538)   on 2012-04-11 10:53:37 (Show Source): You can put this solution on YOUR website!The perimeter of a rectangle is 24cm. You know the lenght is 3 times bigger than the width. What are the dimensions of the rectangle? ----------- P = 2L + 2W = 24 L = W + 3W = 4W 2*4W + 2W = 24 10W = 24 W = 2.4 cm L = 9.6 cm
 Trigonometry-basics/597531: Sin^2 x= cos^2 x for 0 degrees less than or equal to x which is less than 360 degrees I don't understand this problem at all and I am having trouble even being able to find it in my text book. If you could help me solve for x on this one, I think it would help me be able to better understand how to do it. Then, I will also have an example to look back on when working on other similar problems. Thank you for your time and help!1 solutions Answer 378233 by Alan3354(31538)   on 2012-04-11 10:06:34 (Show Source): You can put this solution on YOUR website!Sin^2 x= cos^2 x for 0 degrees less than or equal to x which is less than 360 degrees ------- Sin^2 x= cos^2 x 0 <= x < 360 Sub (1 - sin^2) for cos^2 sin^2 = 1 - sin^2 2sin^2 = 1 sin^2 = 1/2 ---- sin = -sqrt(2)/2, +sqrt(2)/2 x = 45 degs, 135 degs, 225 degs, 315 degs
 Triangles/597541: In triangle DEF, DE=17 and measure of angle F=32. Find DF to the nearest tenth1 solutions Answer 378227 by Alan3354(31538)   on 2012-04-11 09:26:14 (Show Source): You can put this solution on YOUR website!In triangle DEF, DE=17 and measure of angle F=32. Find DF to the nearest tenth ---------- Not enough info. You need 3 elements to solve a triangle, and at least 1 has to be a side.
 Trigonometry-basics/597526: Show all steps for finding the exact value of cos(62 degrees) - sin(28 degrees). We are not allowed to use a calculator.1 solutions Answer 378226 by Alan3354(31538)   on 2012-04-11 09:12:41 (Show Source): You can put this solution on YOUR website!Show all steps for finding the exact value of cos(62 degrees) - sin(28 degrees). ------------- 62 = 90 - 28 --> cos(62) = sin(28) ---- sin(28) - sin(28) = 0
 Money_Word_Problems/597533: what is 8% decrease of \$138.00 and would the formula be on excel 1 solutions Answer 378225 by Alan3354(31538)   on 2012-04-11 08:47:55 (Show Source): You can put this solution on YOUR website!what is 8% decrease of \$138.00 and would the formula be on excel ------------- 8% = 0.08 \$138*0.08 = \$11.04 ---- If you mean decrease \$138 by that amount, just subtract it. ---- An 8% decrease leaves 92%, which is 0.92 \$138*0.92 gives the same result. ----- On Excel, if you enter 8 then click %, it changes it to 800% The formula and calculations are trivial. Unless you have a lot of repetitive calculations like this, there's no reason to use Excel. imo
 Polynomials-and-rational-expressions/597417: Is p(x) = -.1x^2 + 50x - 300, a polynomial? 1 solutions Answer 378161 by Alan3354(31538)   on 2012-04-10 21:27:41 (Show Source): You can put this solution on YOUR website!Is p(x) = -.1x^2 + 50x - 300, a polynomial? ------------ p(x) = -.1x^2 + 50x - 300 is an equation. It has an equal sign. ----------------------- -.1x^2 + 50x - 300 is a polynomial.
 Average/597406: what is the average for 14, 30, 16, 201 solutions Answer 378154 by Alan3354(31538)   on 2012-04-10 21:05:35 (Show Source): You can put this solution on YOUR website!There are 4 elements. Add them. Divide by 4
 Trigonometry-basics/597380: rewrite 7pi/5 in degrees1 solutions Answer 378152 by Alan3354(31538)   on 2012-04-10 20:50:50 (Show Source): You can put this solution on YOUR website!rewrite 7pi/5 in degrees ------------ If 7pi/5 is radians, multiply it by 180/pi
 Linear-equations/597350: 2x+5x+4=25 16=4w+2w-2 31+4t-t=40 7a+16-3a=-4 7m+3-4m=-91 solutions Answer 378136 by Alan3354(31538)   on 2012-04-10 19:30:54 (Show Source): You can put this solution on YOUR website!2x+5x+4=25 16=4w+2w-2 31+4t-t=40 7a+16-3a=-4 7m+3-4m=-9 ------------ Is that all one problem? If so, --> no solution. -------- If they're separate problems, show your efforts. email via the Thank You not for help, or to check your work.
 Circles/597348: what is the diameter of a circle with an area of 3.9 miles squared?1 solutions Answer 378135 by Alan3354(31538)   on 2012-04-10 19:29:02 (Show Source): You can put this solution on YOUR website!what is the diameter of a circle with an area of 3.9 miles squared? ----------- d = 2r
 Trigonometry-basics/597331: Tan(7/12 pi)1 solutions Answer 378134 by Alan3354(31538)   on 2012-04-10 19:28:08 (Show Source): You can put this solution on YOUR website!Tan(7/12 pi) ------------- Do you not have a calculator?
 Inverses/597338: show the inverse operations steps 2x+(-3)=151 solutions Answer 378133 by Alan3354(31538)   on 2012-04-10 19:27:20 (Show Source): You can put this solution on YOUR website!show the inverse operations steps 2x+(-3)=15 ------------ I don't know what that means.
 Sequences-and-series/597343: 1,-1,1,-1,1 find the expression for the sequence to find the nth term??1 solutions Answer 378130 by Alan3354(31538)   on 2012-04-10 19:21:08 (Show Source): You can put this solution on YOUR website!= (-1)^n, n = 0,1,2,3...
 Pythagorean-theorem/597342: what is the answer to this pythagorean theoream word problem "the bottom of a ladder must be placed 3 feet from a wall. the ladder is 12 feet long. how far above the ground does the ladder touch the wall?" 1 solutions Answer 378128 by Alan3354(31538)   on 2012-04-10 19:16:41 (Show Source): You can put this solution on YOUR website!"the bottom of a ladder must be placed 3 feet from a wall. the ladder is 12 feet long. how far above the ground does the ladder touch the wall?" ---------- Hint: The ladder (12 ft) is the hypotenuse.
 Circles/597299: I need to make 40 24inch circles please tell me how much fabric I need. Thank you1 solutions Answer 378127 by Alan3354(31538)   on 2012-04-10 19:15:38 (Show Source): You can put this solution on YOUR website!I need to make 40 24inch circles please tell me how much fabric I need. Thank you ----------- It varies with the dimensions of the fabric. If it's 24 inches wide, you'll need 24*40 inches in length. If it's some other width, it changes how the circles can be cut.
 Exponential-and-logarithmic-functions/597238: Hello, how would I solve a log fuction that is a exponent of a number.. example would be 10^log5 Log base is 10, Thanks in advance!1 solutions Answer 378080 by Alan3354(31538)   on 2012-04-10 16:04:00 (Show Source): You can put this solution on YOUR website!how would I solve a log fuction that is a exponent of a number.. example would be 10^log5 Log base is 10 ------------ The log is the exponent. It's the number to which 10 is raised to get 5. ---------- ======================= another approach: solve for n Take the log of both sides log(10) = 1 --> log(n) = log(5) --> n = 5