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# Recent problems solved by 'Alan3354'

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 Trigonometry-basics/747814: What is the angle? Sin theta divide by cos theta equals to 4 and two thirds1 solutions Answer 455147 by Alan3354(34677)   on 2013-05-12 12:04:33 (Show Source): You can put this solution on YOUR website!What is the angle? Sin theta divide by cos theta equals to 4 and two thirds ----------- sin/cos = tan tan = 4 2/3 Use a calculator
 Inverses/747799: I'm olny in the 2nd grade and I'm going to the 3rd grade and I need to know how to do algebra,how do you do algebra.1 solutions Answer 455142 by Alan3354(34677)   on 2013-05-12 11:14:02 (Show Source): You can put this solution on YOUR website!I'm olny in the 2nd grade and I'm going to the 3rd grade and I need to know how to do algebra,how do you do algebra. ----------- You'll have to be more specific. There's no answer for "how do you do algebra?" other than "I do it very well."
 logarithm/747730: I need help solving the following for x log(x)+log(x+1)=71 solutions Answer 455137 by Alan3354(34677)   on 2013-05-12 10:28:27 (Show Source): You can put this solution on YOUR website!log(x)+log(x+1)=7 ========================= log(x*(x+1)) = 7 = log(10^7) x*(x+1) = 10000000
 Geometry_Word_Problems/747787: the length of a rectangle is 1 cm longer than its width and the area is 291cm squared find the width correct to 1 decimal place1 solutions Answer 455135 by Alan3354(34677)   on 2013-05-12 10:24:53 (Show Source): You can put this solution on YOUR website!the length of a rectangle is 1 cm longer than its width and the area is 291cm squared find the width correct to 1 decimal place --------------- W*(W+1) = 291
 Inequalities/747782: How do I find the slope of the equation 10x - 21y = 0? I first tried to put it in the form of y = mx + b, resulting in y = 10x + 21. Afterwards I put 10/21, but there is no way to reduce and 10/21 isn't an option for my answer.1 solutions Answer 455130 by Alan3354(34677)   on 2013-05-12 09:41:59 (Show Source): You can put this solution on YOUR website!How do I find the slope of the equation 10x - 21y = 0? I first tried to put it in the form of y = mx + b, resulting in y = 10x + 21. Afterwards I put 10/21, but there is no way to reduce and 10/21 isn't an option for my answer. ----------------- 10x - 21y = 0? y = (10/21)x [not 10x + 21] Slope = 10/21 That's the slope, regardless of the options.
 Problems-with-consecutive-odd-even-integers/747779: x,y,z and 3 consecutive even integers such that three times the first is two more than twice the third one, what is the second integer ?1 solutions Answer 455128 by Alan3354(34677)   on 2013-05-12 09:34:42 (Show Source): You can put this solution on YOUR website! x,y,z and 3 consecutive even integers such that three times the first is two more than twice the third one, what is the second integer ? ------------------ 3x = 2z + 4 z = x+4 ---- 3x = 2(x + 4) + 4 3x = 2x + 12 x = 12 y = 14
 Expressions-with-variables/747748: Robert is as old as roel. Four years ago he was as old as roel. How old are they now? 1 solutions Answer 455123 by Alan3354(34677)   on 2013-05-12 08:55:59 (Show Source): You can put this solution on YOUR website!Robert is as old as roel. Four years ago he was as old as roel. How old are they now? ---------------- They're the same age. That's all that can be determined.
 Equations/747772: how do I solve: x2+5=30 and x2+x+30 Please tell me the answers A.S.A.P1 solutions Answer 455122 by Alan3354(34677)   on 2013-05-12 08:53:43 (Show Source): You can put this solution on YOUR website!how do I solve: x2+5=30 Subtract 5, take the square root. ================= and x2+x+30 No equal sign, not an equation, nothing to solve.
 logarithm/747765: 1)Write as a single logarithm and simplify log(base 2)√5 - log(base 2)√45 Can you please help me out? Also can you please show me the steps it would really help me understand? Thanks so much in advance:)1 solutions Answer 455109 by Alan3354(34677)   on 2013-05-12 08:05:13 (Show Source): You can put this solution on YOUR website!1)Write as a single logarithm and simplify log(base 2)√5 - log(base 2)√45 ============================= Subtracting logs --> division That's the only step. -------------- I doubt I'm the only tutor who is tired of seeing "Also can you please show me the steps it would really help me understand? " If you have questions about the solutions you can ask them.
 Exponential-and-logarithmic-functions/747752: differentiate and simplify y = 9ln(5/x)1 solutions Answer 455108 by Alan3354(34677)   on 2013-05-12 07:57:40 (Show Source): You can put this solution on YOUR website!differentiate and simplify y = 9ln(5/x) ----------- y = 9ln(5) - 9ln(x) y' = -9/x
 Geometry_Word_Problems/747766: the volume of a cylinder is 198 inches cubed. What is the radius of the cylinder if the height is seven1 solutions Answer 455107 by Alan3354(34677)   on 2013-05-12 07:50:01 (Show Source): You can put this solution on YOUR website!the volume of a cylinder is 198 inches cubed. What is the radius of the cylinder if the height is seven -----------------
 Inequalities/747694: Help! Write |x-3<1| without the absolute value signs. Please show all steps. Answer needed by tomorrow. Thanks in advance.1 solutions Answer 455071 by Alan3354(34677)   on 2013-05-11 22:29:00 (Show Source): You can put this solution on YOUR website!Write |x-3<1| without the absolute value signs. ------- x-3<1 ------ they're in the wrong place, anyway. I don't know why you keep posting it like that, it's meaningless.
 Travel_Word_Problems/747593: tammy drove 693 miles in 11hrs at the same rate how long would it take her to dive 315 miles?1 solutions Answer 455063 by Alan3354(34677)   on 2013-05-11 21:48:19 (Show Source): You can put this solution on YOUR website!tammy drove 693 miles in 11hrs at the same rate how long would it take her to dive 315 miles? ------------- 693/11 = 315/x 693x = 3465 x = 5 hours ================ Or 693/11 = 63 mi/hr 315/63 = 5 hours
 Rate-of-work-word-problems/747653: Starting from home,James traveled uphill to the office supply store for 75 minutes for 4 mph. He traveled back home along the same path downhill at a speed of 12 mph. What is the average speed for the entire trip from home to the office supply store and back? 1 solutions Answer 455060 by Alan3354(34677)   on 2013-05-11 21:38:19 (Show Source): You can put this solution on YOUR website!Starting from home,James traveled uphill to the office supply store for 75 minutes for 4 mph. He traveled back home along the same path downhill at a speed of 12 mph. What is the average speed for the entire trip from home to the office supply store and back? ---------- Avg speed = 2*4*12/(4+12) = 6 mi/hr
 logarithm/747679: Write the equation in logarithmic form 81=(1/9)^-21 solutions Answer 455059 by Alan3354(34677)   on 2013-05-11 21:32:53 (Show Source): You can put this solution on YOUR website!Write the equation in logarithmic form 81=(1/9)^-2 ---------------
 test/747654: A bicycle store costs \$2400 per month to operate. The store pays an average of \$60 per bike. The average selling price of each bicycld1 solutions Answer 455044 by Alan3354(34677)   on 2013-05-11 19:39:56 (Show Source): You can put this solution on YOUR website!A bicycle store costs \$2400 per month to operate. The store pays an average of \$60 per bike. The average selling price of each bicycld ---------------- Sounds like a good business.
 Equations/747630: When two numbers x and y are added together, the sum is 52. y is 3 times larger than x. Find y.1 solutions Answer 455023 by Alan3354(34677)   on 2013-05-11 18:05:54 (Show Source): You can put this solution on YOUR website!When two numbers x and y are added together, the sum is 52. y is 3 times larger than x. Find y. ------------ y = x + 3 times x = 4x x + y = 52 x + 4x = 52 x = 10.4 y = 4x y = 41.6 ============== 3 times larger = 4 times as large, not 3 times as large.
 Travel_Word_Problems/747620: A motorboat takes 4 hours to travel 192 km going upstream. The return trip takes 3 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?1 solutions Answer 455022 by Alan3354(34677)   on 2013-05-11 18:01:49 (Show Source): You can put this solution on YOUR website!A motorboat takes 4 hours to travel 192 km going upstream. The return trip takes 3 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? ----------------- Find the 2 speeds going and returning. The boat's speed is the average of the 2 speeds. The current is the difference between boat speed and ground speed.
 logarithm/747584: Log x 9= 1/21 solutions Answer 455021 by Alan3354(34677)   on 2013-05-11 18:00:04 (Show Source): You can put this solution on YOUR website!Log x 9= 1/2 ------------- If you mean then x = 81
 Equations/747637: Solve the following system of equations: x –2y+z=6 2x+y –3z= –3 x –3y+3z=10 Please ahow me the steps in order to understand it. Thank you1 solutions Answer 455020 by Alan3354(34677)   on 2013-05-11 17:53:35 (Show Source): You can put this solution on YOUR website!Solve the following system of equations: x –2y+z=6 2x+y –3z= –3 x –3y+3z=10 ------------- Multiply egn 1 & 3 by 2. Subtract eqn 1 from eqn 2 --> an eqn in y & z Subtract eqn 1 from eqn 3 --> an eqn in y & z --- That leaves 2 eqns in y & z Can you finish it? ========================= I would use determinants. You familiar with those?
 Geometry_Word_Problems/747641: A water reservoir is shaped like a rectangular solid that has a base of 50 yds by 30 yds. At the start of a three month period of no rain, the reservoir was completely full, at the end of this period, the height of the water went down to 6 yds, how much water was used in this three month period? 1 solutions Answer 455018 by Alan3354(34677)   on 2013-05-11 17:46:54 (Show Source): You can put this solution on YOUR website!A water reservoir is shaped like a rectangular solid that has a base of 50 yds by 30 yds. At the start of a three month period of no rain, the reservoir was completely full, at the end of this period, the height of the water went down to 6 yds, how much water was used in this three month period? ---------------- "went down to 6 yds" from what? Not enough info
 Travel_Word_Problems/747638: A car is driven 50km in a SouthWest direction. How far south has it travelled? Answer using Triganometry1 solutions Answer 455017 by Alan3354(34677)   on 2013-05-11 17:36:12 (Show Source): You can put this solution on YOUR website!A car is driven 50km in a SouthWest direction. How far south has it travelled? Answer using Triganometry ----------------- south component = 50*sin(45) = 25*sqrt(2) km
 Travel_Word_Problems/747628: Why am I gay?1 solutions Answer 455016 by Alan3354(34677)   on 2013-05-11 17:33:28 (Show Source): You can put this solution on YOUR website!Why am I gay? ------------- For the same reason others are not gay.
 Radicals/747624: I need help writing 5 4/9 as a radical 1 solutions Answer 455014 by Alan3354(34677)   on 2013-05-11 17:32:25 (Show Source): You can put this solution on YOUR website!I need help writing 5 4/9 as a radical ---------- Why would it be a radical?
 real-numbers/747631: -5/8+(-1/6)1 solutions Answer 455013 by Alan3354(34677)   on 2013-05-11 17:31:19 (Show Source): You can put this solution on YOUR website!-5/8+(-1/6) = -(5/8) - (1/6) = -30/48 - 8/48 = -38/48 = -19/24
 Inequalities/747588: Write the following without absolute symbols. lx-3<1l Please show all steps, answer needed ASAP.1 solutions Answer 455011 by Alan3354(34677)   on 2013-05-11 17:11:08 (Show Source): You can put this solution on YOUR website!lx-3<1l ----------- 1x-3 < 11 Add 3 to both sides. ----------- If the outside symbols are meant to be abs value, they're in the wrong place. Use | for abs value.
 Travel_Word_Problems/747635: A jet travels 1200 miles in 30 minutes. Find the average speed in miles per hour.1 solutions Answer 455009 by Alan3354(34677)   on 2013-05-11 17:06:53 (Show Source): You can put this solution on YOUR website!A jet travels 1200 miles in 30 minutes. Find the average speed in miles per hour. ------------------ In another 30 minutes it would go an additional 1200 miles for a total of 2400 miles.
 test/747603: Im need help with geometry and algebra. Im 33 years old and wanting to further my education please help1 solutions Answer 455001 by Alan3354(34677)   on 2013-05-11 15:26:54 (Show Source): You can put this solution on YOUR website!Im need help with geometry and algebra. Im 33 years old and wanting to further my education please help ---------------- Post any problems you need help with. If it's general, look for online courses.
 Length-and-distance/747589: A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve? A. 160 meters B. 16 meters C. 32 meters D. 80 meters The acceleration of gravity is a constant equal to _______ meters per second squared. A. 8.4 B. 7.6 C. 9.8 D. 10.21 solutions Answer 455000 by Alan3354(34677)   on 2013-05-11 15:25:49 (Show Source): You can put this solution on YOUR website!A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve? A. 160 meters B. 16 meters C. 32 meters D. 80 meters ------------- CF = mv^2/r Solve for r -------------------- The acceleration of gravity is a constant equal to _______ meters per second squared. A. 8.4 B. 7.6 C. 9.8 D. 10.2 ------------ apx 9.8 on Earth's surface.
 test/747572: I need help learning algebra1 solutions Answer 454999 by Alan3354(34677)   on 2013-05-11 15:22:28 (Show Source): You can put this solution on YOUR website!I need help learning algebra ------------------- Post a problem you need help with.
 Permutations/747595: how many teams of three can you make from a class of 27?1 solutions Answer 454996 by Alan3354(34677)   on 2013-05-11 15:18:18 (Show Source): You can put this solution on YOUR website!how many teams of three can you make from a class of 27? ----------- the 1st choice is 1 of 27, then 1/26, then 1/25 = 27*26*25 = 17550 ------------- but choosing A, B & C is the same at B, A & C, so divide by 3*2*1 17550/6 = 2925 ways