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 logarithm/685166: Write 2lnx - 1/2(x^2+1) in the condensed form1 solutions Answer 424371 by Alan3354(34674)   on 2012-11-26 13:27:15 (Show Source): You can put this solution on YOUR website!Write 2lnx - 1/2(x^2+1) in the condensed form ---------------- 2ln(x) - 1/2(x^2+1) =
 Surface-area/685185: what is the area in square meters, of the base of the monument of a right square pyramid?1 solutions Answer 424370 by Alan3354(34674)   on 2012-11-26 13:25:01 (Show Source): You can put this solution on YOUR website!what is the area in square meters, of the base of the monument of a right square pyramid? ---------- It varies with the size of the base.
 Numeric_Fractions/685175: Applications... the pharmacy has 5 gram vials of medication. How many 1/2 gram doses are available????1 solutions Answer 424369 by Alan3354(34674)   on 2012-11-26 13:24:11 (Show Source): You can put this solution on YOUR website!the pharmacy has 5 gram vials of medication. How many 1/2 gram doses are available???? --------------- What do 4 question marks mean? --------- the pharmacy has 5 gram vials of medication. How many 1/2 gram doses are available???? ----------- Hint: 2 1/2 gm doses = 1 gram
 Travel_Word_Problems/685123: It is 6 kilometers from Maya's house to the nearest mailbox. How far is it in meters? Be sure to include the correct unit in your answer. 1 solutions Answer 424345 by Alan3354(34674)   on 2012-11-26 11:04:13 (Show Source): You can put this solution on YOUR website!It is 6 kilometers from Maya's house to the nearest mailbox. How far is it in meters? Be sure to include the correct unit in your answer. ============= 1 km = 1000 meters ---- kilo means 1000 mega means 1,000,000 ----- milli means 0.001
 Age_Word_Problems/685095: if father is 4 time older from daughter, and 6 years back he was 10 time older what is his age?1 solutions Answer 424344 by Alan3354(34674)   on 2012-11-26 10:58:40 (Show Source): You can put this solution on YOUR website!if father is 4 time older from daughter, and 6 years back he was 10 time older what is his age? --------------- f = father's age, d = daughter's --- 4 times older = 5 times as old now: f = 5d 6 yrs ago: f-10 = 11*(d-10) f-10 = 11d - 110 f = 11d - 100 Sub for f 5d = 11d - 100 -6d = -100 d = 16 2/3 years f = 83 1/3 years ------------------- The answers are not integers because you're expected to think that "4 times older" means 4 times as old. It does not. Using %ages, if something is 100% older --> 2x as old. 1 time older = 2 times as old. ---------- Tell the teacher the author of the textbook should find a different line of work.
 test/685099: Graph X+1/x^2+2x-31 solutions Answer 424343 by Alan3354(34674)   on 2012-11-26 10:50:56 (Show Source): You can put this solution on YOUR website!-------------- dl the FREE graph software at http://www.padowan.dk ---- Use Insert, then enter the function. Include parentheses to clarify the NUM & DEN.
 test/685100: Graph -x^2-x+2/x^2-2x-31 solutions Answer 424342 by Alan3354(34674)   on 2012-11-26 10:50:36 (Show Source): You can put this solution on YOUR website!-------------- dl the FREE graph software at http://www.padowan.dk ---- Use Insert, then enter the function. Include parentheses to clarify the NUM & DEN.
 test/685101: Graph X-1/x^2-2x-31 solutions Answer 424341 by Alan3354(34674)   on 2012-11-26 10:50:10 (Show Source): You can put this solution on YOUR website!-------------- dl the FREE graph software at http://www.padowan.dk ---- Use Insert, then enter the function. Include parentheses to clarify the NUM & DEN.
 test/685102: Graph X^2-x+2/x^2+2x-31 solutions Answer 424340 by Alan3354(34674)   on 2012-11-26 10:49:46 (Show Source): You can put this solution on YOUR website!Graph X^2-x+2/x^2+2x-3 -------------- dl the FREE graph software at http://www.padowan.dk ---- Use Insert, then enter the function. Include parentheses to clarify the NUM & DEN.
 Trigonometry-basics/685117: Given sinB 11/18 find angle B in degrees. Round your answer to the nearest hundredth.1 solutions Answer 424339 by Alan3354(34674)   on 2012-11-26 10:46:44 (Show Source): You can put this solution on YOUR website!Given sinB 11/18 find angle B in degrees. Round your answer to the nearest hundredth. --------- B =~ 37.67 degs I used a calculator.
 Average/685051: The average of thus set if numbers 15, 96, 18, and 45?1 solutions Answer 424323 by Alan3354(34674)   on 2012-11-26 08:22:16 (Show Source): You can put this solution on YOUR website!The average of thus set if numbers 15, 96, 18, and 45? --------- There are 4 numbers. Add them, divide by 4
 Travel_Word_Problems/685062: A racecar can travel 4 laps in 5 minutes. At this rate, it will take the racecar 93.25 minutes to complete 75 laps (in minutes).1 solutions Answer 424322 by Alan3354(34674)   on 2012-11-26 08:20:46 (Show Source): You can put this solution on YOUR website!A racecar can travel 4 laps in 5 minutes. At this rate, it will take the racecar 93.25 minutes to complete 75 laps (in minutes). --------------- You sure? Do you have a question?
 Money_Word_Problems/685044: In how many years will it take a certain investment to double itself if the interest is compounded annually at 6%? 1 solutions Answer 424321 by Alan3354(34674)   on 2012-11-26 08:19:15 (Show Source): You can put this solution on YOUR website!In how many years will it take a certain investment to double itself if the interest is compounded annually at 6%? ---------------- FV = PV*(1.06)^t (1.06)^t = 2 t*log(1.06) = log(2) t = log(2)/log(1.06)
 test/685059: how do i work out 780 divided by 946?1 solutions Answer 424319 by Alan3354(34674)   on 2012-11-26 08:17:03 (Show Source): You can put this solution on YOUR website!how do i work out 780 divided by 946? ------------ Divide 780 by 946 = 780/946 I would use a calculator, but it can be done with pencil and paper.
 Trigonometry-basics/685060: Verify the identity Secycosy=11 solutions Answer 424318 by Alan3354(34674)   on 2012-11-26 08:15:51 (Show Source): You can put this solution on YOUR website!Verify the identity Secycosy=1 ----------- sec = 1/cos
 Trigonometry-basics/685056: What is the period of this function: y=-2sin(3pix)1 solutions Answer 424317 by Alan3354(34674)   on 2012-11-26 08:15:08 (Show Source): You can put this solution on YOUR website!What is the period of this function: y=-2sin(3pix) ---- radian
 �t�e�s�t/685065: Can anybody help me with the answers to the questions below in this problem please?! How many pairs of these numbers add up to a multiple of 11. 9, 46, 79, 13 64, 90, 2, 97, 25, 31, 20, 22 4, 52, 55, 7 How could you convince someone that they haven't missed any? Notice anything interesting about the pairs of numbers? Can you explain what's happening?1 solutions Answer 424315 by Alan3354(34674)   on 2012-11-26 08:10:49 (Show Source): You can put this solution on YOUR website!How many pairs of these numbers add up to a multiple of 11. 9, 46, 79, 13 64, 90, 2, 97, 25, 31, 20, 22 4, 52, 55, 7 How could you convince someone that they haven't missed any? -------------- I did this one a few days ago.
 Travel_Word_Problems/684949: Two cars are traveling toward each other. They started at the same time from 48- miles apart and met after 4 hours. If one car travels 40 miles per hour faster than the other car, find the speed of each car.1 solutions Answer 424253 by Alan3354(34674)   on 2012-11-25 22:57:28 (Show Source): You can put this solution on YOUR website!Two cars are traveling toward each other. They started at the same time from 48- miles apart and met after 4 hours. If one car travels 40 miles per hour faster than the other car, find the speed of each car. ------------- The sum of their speeds is 48/4 = 12 mi/hr The difference can't be 40 mi/hr
 Polynomials-and-rational-expressions/684888: Please help me solve this problem: 4x*1/5+1/R=x*5+R I tried solving it the following way, but I'm sure if it is correct. I added the fractions and got: 4x*R+5/5R=x*5+R I then tried to cancel the fraction by multiplying everything by the fraction and got: 4x*R+5*5R=x*5+R*5+R = = I then cancelled the xs and got: Then I multiplied the R and 25R by 4 and got: I am not sure If I should proceed from here because I am not sure if the working above is correct.1 solutions Answer 424243 by Alan3354(34674)   on 2012-11-25 21:35:12 (Show Source): You can put this solution on YOUR website!4x*1/5+1/R=x*5+R -------------- 4x/5 + 1/r = 5x + r (don't include gibberish) Solve for what? x or R? It's 2 variables, only 1 equation.
 Trigonometry-basics/684906: Solve for x in the given internval. 2 tan x = sec x [-2 pi, 0] Thanks!1 solutions Answer 424242 by Alan3354(34674)   on 2012-11-25 21:29:54 (Show Source): You can put this solution on YOUR website!2 tan x = sec x --------------- Multiply both sides by cos(x)
 logarithm/684903: ln x^-3 - (ln x)^2 = -281 solutions Answer 424240 by Alan3354(34674)   on 2012-11-25 21:14:02 (Show Source): You can put this solution on YOUR website!ln x^-3 - (ln x)^2 = -28 ------------- If you mean ln(x^-3) and (ln(x))^2 -3ln(x) - (ln x)^2 = -28 (ln(x))^2 + 3ln(x) - 28 = 0 sub u for ln(x) (u + 7)*(u - 4) = 0 ------- ln(x) = -7 --------- ln(x) = 4
 Graphs/684832: Using the Slope-Intercept Form please help me solve this graph(y-9)= 4(x-2)1 solutions Answer 424224 by Alan3354(34674)   on 2012-11-25 19:36:04 (Show Source): You can put this solution on YOUR website!Using the Slope-Intercept Form please help me solve this graph(y-9)= 4(x-2) ----------------- I don't see a graph. Solve it for what?
 logarithm/684805: solve for x Log3x+log3(x-4)=1 hint: all 3 are subscripts (I don't know how to put subscript here please tell me all i know is writing superscript like this symbol(^).whats for subscript?1 solutions Answer 424221 by Alan3354(34674)   on 2012-11-25 19:29:21 (Show Source): You can put this solution on YOUR website!solve for x Log3x+log3(x-4)=1 ---------------- 3(x-4) = 3 x = 5 ---------- Click the Show source to see how it's entered.
Trigonometry-basics/684843:
the cos is powered
1 solutions

Answer 424219 by Alan3354(34674)   on 2012-11-25 19:22:58 (Show Source):
You can put this solution on YOUR website!

cos^2 = 1 - sin^2

----------------
sub y for sin(x)

 Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc) Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . Discriminant d=25 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: 0.5, -2. Here's your graph:

sin(x) = -2, ignore, no real numbers.
sin(x) = 0.5
x = pi/6 + 2n*pi, n = 0,1,2,3
x = 5pi/6 + 2n*pi, n = 0,1,2,3

 Trigonometry-basics/684806: write an expression as a sum or difference of trigonometric functions 2sin62(degrees)cos90(degrees)1 solutions Answer 424211 by Alan3354(34674)   on 2012-11-25 18:13:44 (Show Source): You can put this solution on YOUR website!write an expression as a sum or difference of trigonometric functions 2sin62(degrees)cos90(degrees) cos(90) = 0 --> 0
 Equations/684787: f(-2)=3×+21 solutions Answer 424204 by Alan3354(34674)   on 2012-11-25 17:47:23 (Show Source): You can put this solution on YOUR website!That makes no sense. -2 is not a variable Do you mean f(x)=3x+2 ? Then, what's your question?
 Equations/684786: f(x)=3x+2, what is the value if x=4?1 solutions Answer 424203 by Alan3354(34674)   on 2012-11-25 17:46:48 (Show Source): You can put this solution on YOUR website!f(4)=3x+2 ------------- That makes no sense. 4 is not a variable Do you mean f(x)=3x+2 ? Then, what's your question?
 Graphs/684769: the formula (y2-y1)=m(x2-x1) the points are (6.25,0)=m(10,0) (8,5-6,25)+m(10-0) 2.25/10 m=10/10 0.25=m m=0.225 Your slope is correct. Now you need to write the equation of the line by using y – y1 = m(x – x1) where m = 0.225 and (x1, y1) is one of the given points. 1 solutions Answer 424202 by Alan3354(34674)   on 2012-11-25 17:42:53 (Show Source): You can put this solution on YOUR website!the formula (y2-y1)=m(x2-x1) the points are (6.25,0)=m(10,0) (8,5-6,25)+m(10-0) 2.25/10 m=10/10 0.25=m m=0.225 Your slope is correct. Now you need to write the equation of the line by using y – y1 = m(x – x1) where m = 0.225 and (x1, y1) is one of the given points. ------------- Are you asking a question? What are the 2 points?
 Rectangles/684745: if the areo of a given rectangle is 24 and the perimeter of the same rectangle is 22 . what are the measurements for the length and width?1 solutions Answer 424191 by Alan3354(34674)   on 2012-11-25 16:30:34 (Show Source): You can put this solution on YOUR website!if the areo of a given rectangle is 24 and the perimeter of the same rectangle is 22 . what are the measurements for the length and width? -------------- P = 2L + 2W = 22 L + W = 11 L*W = 24 ------- Find 2 factors of 24 that add to 11.
 Functions/684719: M= gx/g+x for x1 solutions Answer 424185 by Alan3354(34674)   on 2012-11-25 16:05:14 (Show Source): You can put this solution on YOUR website!M= gx/g+x for x ---------- M*(g+x) = gx Mg + Mx = gx Mg = gx - Mx Mg = x*(g - M) Now what?
 Travel_Word_Problems/684724: dave ran 2 km at 8 km per hour.Andy ran 2km at 10 km per hour.It took dave ___ more minutes than andy to run the 2 km ?1 solutions Answer 424184 by Alan3354(34674)   on 2012-11-25 16:03:24 (Show Source): You can put this solution on YOUR website!dave ran 2 km at 8 km per hour.Andy ran 2km at 10 km per hour.It took dave ___ more minutes than andy to run the 2 km ? -------------- d = r*t t = d/r ----- Find the 2 times, get the difference