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# Recent problems solved by 'Alan3354'

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 Polynomials-and-rational-expressions/711482: Hi! My question is this..f(x)=x^3+4x^2-5 Thanks! Melissa1 solutions Answer 437431 by Alan3354(31530)   on 2013-02-06 20:53:06 (Show Source): You can put this solution on YOUR website!Hi! My question is this..f(x)=x^3+4x^2-5 ------------- That's a function, not a question. What do you want to do?
 Numeric_Fractions/711423: How I write in simplest form 3 5/8 + 11 1/2? 1 solutions Answer 437413 by Alan3354(31530)   on 2013-02-06 19:48:07 (Show Source): You can put this solution on YOUR website!3 5/8 + 11 1/2? --------- = 29/8 + 23/2 = 29/8 + 92/8 = 121/8
 logarithm/711421: I can't figure this out. First of all, the 4's in this problem are down at the bottom (like the opposite of an exponent) I can't remember what they are called. It says, log4(x+7)= log4 14 tiny fours at the bottom of each log. Thanks! Melissa1 solutions Answer 437403 by Alan3354(31530)   on 2013-02-06 19:07:31 (Show Source): You can put this solution on YOUR website!4 is the bases. ------- x + 7 = 14 x = 7
 Geometry_Word_Problems/711425: the area of the floor of the rectangular room is 175 feet. the length of the room is 1 1/2 feet longer than the width. find the length of the room1 solutions Answer 437402 by Alan3354(31530)   on 2013-02-06 19:04:12 (Show Source): You can put this solution on YOUR website!the area of the floor of the rectangular room is 175 feet. the length of the room is 1 1/2 feet longer than the width. find the length of the room ---------------- The area can't be 175 feet, that's not a unit of area.
 Polygons/711405: How do you find the perimeter of a regular polygon with only a side length and a interior angle?1 solutions Answer 437400 by Alan3354(31530)   on 2013-02-06 18:51:28 (Show Source): You can put this solution on YOUR website!How do you find the perimeter of a regular polygon with only a side length and a interior angle? =================== Ext angle = 180 - Int angle 360/Ext angle = # of sides etc
 Mixture_Word_Problems/711414: Find the quantity of a 30% solution which must be mixed with a 15% solution to produce 600 kg of 25% solution1 solutions Answer 437399 by Alan3354(31530)   on 2013-02-06 18:49:20 (Show Source): You can put this solution on YOUR website!Find the quantity of a 30% solution which must be mixed with a 15% solution to produce 600 kg of 25% solution ----------- t = amount of 30% f = 15% -------- t + f = 600 30t + 15f = 25*600 ========= etc
 Travel_Word_Problems/711290: My question is "Two buses leave Atlanta at the same time, one traveling west at 40 miles per hour and the other traveling north at 30 miles per hour. When will they be 400 miles apart?" I found the answer in the back of the book, but have no idea what steps to take to solve this problem. 1 solutions Answer 437367 by Alan3354(31530)   on 2013-02-06 15:30:53 (Show Source): You can put this solution on YOUR website!"Two buses leave Atlanta at the same time, one traveling west at 40 miles per hour and the other traveling north at 30 miles per hour. When will they be 400 miles apart?" ----------------- Their paths form a right triangle. At t hours after departure, the westbound bus is 40t miles away, the northbound is 30t miles away. ---- d = 50t ---- 400 = 50t t = 8 hours ---------------- You can use the speeds in a similar manner v = 50 mi/hr t = 400/50 = 8 hours
 Miscellaneous_Word_Problems/711278: If we stand on top of a 150- foot building and throw a ball up into the air with an initial velocity of 22 feet per second, then the height of the ball above the ground is given by. Please help me solve this velocity problem Determine when the ball hits the ground. Include the correct unit of measure in your answer and round to two decimal places. 1 solutions Answer 437361 by Alan3354(31530)   on 2013-02-06 15:20:08 (Show Source): You can put this solution on YOUR website! Determine when the ball hits the ground. ----------------- It impacts when h = 0 Solve for t, ignore the negative number.
 Triangles/711269: Hi, I had a math test today and we were allowed to go back and finish up since our class period was shortened. There was one problem I did not understand and it went something like this: Find the like of the third side of the obtuse triangle with the longest side 36 and one of the legs 4. (Those numbers were just made up) I know that c^2 > a^2 + b^2 then the triangle is obtuse. But I also know that to find the range of the third side you would need to do: a + b = d and a - b = e, leaving you with e < x < d (Let x be any number within the given range). I just don't know how to find the range for the obtuse triangle. Thank you so much!1 solutions Answer 437356 by Alan3354(31530)   on 2013-02-06 14:57:07 (Show Source): You can put this solution on YOUR website!Find the like of the third side of the obtuse triangle with the longest side 36 and one of the legs 4. (Those numbers were just made up) -------------- Do you mean length? It has to be less than the sum of 36 & 4, < 40 ---- To be obtuse, s^2 > 36^2 + 4^2 --> s > sqrt(1312) ----------------------------- sqrt(1312) < s < 40
 Trigonometry-basics/711254: Convert -5pi/2 radians into degrees (report answer between 0 and 360 degrees) Thanks, paulaficarella@gmail.com1 solutions Answer 437354 by Alan3354(31530)   on 2013-02-06 14:28:53 (Show Source): You can put this solution on YOUR website!Convert -5pi/2 radians into degrees (report answer between 0 and 360 degrees) ---------- -5pi/2*(180/pi) = -450 degs Add 360 repeatedly until you get a + number 150 + 360 = -90 -90 + 360 = 270 degs
 Numeric_Fractions/711246: What is 3/8 + 6/16?1 solutions Answer 437348 by Alan3354(31530)   on 2013-02-06 14:03:07 (Show Source): You can put this solution on YOUR website!What is 3/8 + 6/16? ------------------- = 3/8 + 3/8 = 6/8 = 3/4
 Travel_Word_Problems/711215: How long will it take to travel 460kilometers while traveling at 100kilometers per hour1 solutions Answer 437345 by Alan3354(31530)   on 2013-02-06 13:56:48 (Show Source): You can put this solution on YOUR website!How long will it take to travel 460kilometers while traveling at 100kilometers per hour --------------- d = r*t t = d/r
 Trigonometry-basics/711258: Explain how to find the value of cos49 using the sin function. (hint: how does the cosine relate to the sine?) Thanks, paulaficarella@gmail.com1 solutions Answer 437343 by Alan3354(31530)   on 2013-02-06 13:51:43 (Show Source): You can put this solution on YOUR website!Explain how to find the value of cos49 using the sin function. (hint: how does the cosine relate to the sine?) --------------
 Sequences-and-series/711259: you can row a canoe 4 miles per hour upstream and 6 miles per hour downstream. what is the average speed of the canoe in still water?1 solutions Answer 437342 by Alan3354(31530)   on 2013-02-06 13:49:34 (Show Source): You can put this solution on YOUR website!you can row a canoe 4 miles per hour upstream and 6 miles per hour downstream. what is the average speed of the canoe in still water? -------------- It's the average, 5 mi/hr
 Travel_Word_Problems/711252: how fast would you go if you went 25 mi in 15 min? 1 solutions Answer 437339 by Alan3354(31530)   on 2013-02-06 13:24:57 (Show Source): You can put this solution on YOUR website!how fast would you go if you went 25 mi in 15 min? -------------- d = r*t r = d/t = 25/15 r = 5/3 miles/minute
 test/711206: Solve the following equation for Y 36x+4y=-28 help me please 1 solutions Answer 437327 by Alan3354(31530)   on 2013-02-06 11:33:41 (Show Source): You can put this solution on YOUR website!Solve the following equation for Y 36x+4y=-28 ---------------- 36x+4y=-28 Divide by 4 9x + y = -7 Subtract 9x y = -9x - 7
 Reduction-of-unit-multipliers/711187: Out of 90 problems, these 4 remain, can someone please help, I can't figure out what ratio to use, here they are: Use dimensional analysis to convert. 2.1 kiloliters to quarts, 514 decimeters to yards 3 yards to millimeters 2.6 feet to decimeters Thank you sincerely if you can help.1 solutions Answer 437321 by Alan3354(31530)   on 2013-02-06 11:07:09 (Show Source): You can put this solution on YOUR website!Use dimensional analysis to convert. 2.1 kiloliters to quarts 1 liter =~ 1.05668821 qts ======================== 514 decimeters to yards 1 inch = 2.54 cm ==================== 3 yards to millimeters Same as above ================== 2.6 feet to decimeters Same as above
 t e s t/711185: sin2x/sinx - cos2x/cosx = secx Prove this identity starting with sin2x/sinx - cos2x/cosx=1 solutions Answer 437319 by Alan3354(31530)   on 2013-02-06 11:03:38 (Show Source): You can put this solution on YOUR website!sin2x/sinx - cos2x/cosx = secx Prove this identity starting with sin2x/sinx - cos2x/cosx= -------------- Is it sin(2x), or sin^2(x) ?
 Trigonometry-basics/711189: Use the graph to find the value of y = sin q for the value of q. π radians 1 solutions Answer 437318 by Alan3354(31530)   on 2013-02-06 11:02:02 (Show Source): You can put this solution on YOUR website!Use the graph to find the value of y = sin q for the value of q. ----------- What graph?
 Exponential-and-logarithmic-functions/710345: Solve the expression for t assuming that all other letters are positive constants.1 solutions Answer 437297 by Alan3354(31530)   on 2013-02-06 09:03:46 (Show Source): You can put this solution on YOUR website!Solve the expression for t assuming that all other letters are positive constants. --------------- Assuming T <> t I'll sub s for T temporarily to make typing easier -----
 Sequences-and-series/711137: How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams? 1 solutions Answer 437296 by Alan3354(31530)   on 2013-02-06 08:57:48 (Show Source): You can put this solution on YOUR website!How long will it take for 100 grams of a substance with a half-life of 2 years to decay to a mass of 50 grams? ---------------- It's half as much, so it'll take 2 years.
 test/710929: Trinity031 solutions Answer 437250 by Alan3354(31530)   on 2013-02-05 20:24:27 (Show Source): You can put this solution on YOUR website!Trinity03 --------- Do you have a question?
 Numeric_Fractions/710943: what is the answer to -4y+10=-2(4y+11) 1 solutions Answer 437248 by Alan3354(31530)   on 2013-02-05 20:22:17 (Show Source): You can put this solution on YOUR website!what is the answer to -4y+10=-2(4y+11) ----------- What is the question?
 Percentage-and-ratio-word-problems/710939: What is three and one half as a percentWhat is three and one half as a percent1 solutions Answer 437247 by Alan3354(31530)   on 2013-02-05 20:18:15 (Show Source): You can put this solution on YOUR website!What is three and one half as a percentWhat is three and one half as a percent -------- 3.5*100 = 350%
 Numbers_Word_Problems/710913: I am a square number the sum of my digits are 9 what square numberS might I be1 solutions Answer 437241 by Alan3354(31530)   on 2013-02-05 19:54:27 (Show Source): You can put this solution on YOUR website! I am a square number the sum of my digits are [sic] 9 what square numberS might I be ------------ Might be 9 or 36 Or 81 Or 144 or 225 or 324 or 441 or 900 or 1521 or 2025 or 2304 or 2601 or 3600 or some others.
 Rational-functions/710905: logarithms, log2(x+3)-log2(2x-1)=2 my problem is with the subtraction part??1 solutions Answer 437235 by Alan3354(31530)   on 2013-02-05 19:34:13 (Show Source): You can put this solution on YOUR website!log2(x+3)-log2(2x-1)=2 ----------- ------------ Can you finish it?
 Square-cubic-other-roots/710906: What is the answer to the sqaure root of 27/36?1 solutions Answer 437230 by Alan3354(31530)   on 2013-02-05 19:29:03 (Show Source): You can put this solution on YOUR website!What is the answer to the sqaure root of 27/36? ---------- What is the question?
 Linear-systems/710854: y = x - 1 x + 1 = 3 1 solutions Answer 437215 by Alan3354(31530)   on 2013-02-05 18:17:42 (Show Source): You can put this solution on YOUR website!duplicate
 Linear-systems/710856: y = x - 1 x + y = 3 1 solutions Answer 437214 by Alan3354(31530)   on 2013-02-05 18:17:09 (Show Source): You can put this solution on YOUR website!y = x - 1 x + y = 3 =========== -x + y = -1 +x + y = 3 ------------------- Add
 Surface-area/710859: there is a triangle and it is asking to find the simplified algebraic expression. the base(or leg) of the triangle is x-4 and the other leg says 2x+2. What is the simplified algebraic expression?1 solutions Answer 437212 by Alan3354(31530)   on 2013-02-05 18:15:46 (Show Source): You can put this solution on YOUR website!there is a triangle and it is asking to find the simplified algebraic expression. the base(or leg) of the triangle is x-4 and the other leg says 2x+2. What is the simplified algebraic expression? ---------------- A talking triangle? --------- 2 sides is not sufficient to solve for other elements of a triangle, talking or not.