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# Recent problems solved by 'Alan3354'

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 Travel_Word_Problems/569364: an airliner travels 90 miles in 10 minutes, what is its speed in miles per hour1 solutions Answer 367310 by Alan3354(31518)   on 2012-02-07 21:30:12 (Show Source): You can put this solution on YOUR website!an airliner travels 90 miles in 10 minutes, what is its speed in miles per hour -------- 90 mi/10 min = 9 miles/minute 9*60 = 540 mi/hr
 Percentage-and-ratio-word-problems/569400: Can someone please help me with this? : The ratio of men to women in a club is 3:7.There are 50 members of the club. How many are men? 1 solutions Answer 367309 by Alan3354(31518)   on 2012-02-07 21:28:54 (Show Source): You can put this solution on YOUR website!The ratio of men to women in a club is 3:7.There are 50 members of the club. How many are men? ----------------- 3+7 = 10 50/10 = 5 ---------- 3*5 = 15 men 7*5 = 35 women
 Radicals/569285: between which two consecutive integers is the cube root is 111 solutions Answer 367273 by Alan3354(31518)   on 2012-02-07 19:20:50 (Show Source): You can put this solution on YOUR website!between which two consecutive integers is the cube root is 11 ------------ That makes no sense.
 Surface-area/569220: how do you find volume of a cone 1 solutions Answer 367262 by Alan3354(31518)   on 2012-02-07 17:36:59 (Show Source): You can put this solution on YOUR website!how do you find volume of a cone ------ If you know the radius of the base and the height:
 Quadratic_Equations/569221: y=x-1 y=-x=1 1 solutions Answer 367260 by Alan3354(31518)   on 2012-02-07 17:35:59 (Show Source): You can put this solution on YOUR website!y=x-1 y=-x=1 Too many equal signs. -----
 Functions/569216: Find ƒ(–5) for each function. ƒ(x) = 5x + 35 ƒ(x) = 5x + 351 solutions Answer 367259 by Alan3354(31518)   on 2012-02-07 17:33:09 (Show Source): You can put this solution on YOUR website!Find ƒ(–5) for each function. ƒ(x) = 5x + 35 Sub 5 for x f(5) = 5*5 + 35 = 25 + 35 f(5) = 60 --------------- ƒ(x) = 5x + 35 That looks familiar.
 Rectangles/569217: Can someone help me with this question: A rectangle animal pen will be built using 200 meters of fencing. If one side of the rectangle is 60meters, find the area of the pen.1 solutions Answer 367258 by Alan3354(31518)   on 2012-02-07 17:31:31 (Show Source): You can put this solution on YOUR website!Can someone help me with this question: A rectangle [sic] animal pen will be built using 200 meters of fencing. If one side of the rectangle is 60meters, find the area of the pen. ----------- Hint: Perimeter = 2(L + W) = 200 L + W = 100 ---- Area = L*W
 Linear_Equations_And_Systems_Word_Problems/569200: An MP3 player costs \$40. The sales tax is \$2.40. What is the percent of sales tax? 1 solutions Answer 367256 by Alan3354(31518)   on 2012-02-07 17:24:19 (Show Source): You can put this solution on YOUR website!2.4/40 = 0.06 --> 6%
 Quadratic-relations-and-conic-sections/569207: 27x^2+9y^2=811 solutions Answer 367253 by Alan3354(31518)   on 2012-02-07 17:05:52 (Show Source): You can put this solution on YOUR website!27x^2+9y^2=81 -------------- Do you have a question?
 Triangles/569209: how would i be able to figure out if something is a triangle for example if they would give me {8,24,25}?1 solutions Answer 367252 by Alan3354(31518)   on 2012-02-07 17:04:47 (Show Source): You can put this solution on YOUR website!how would i be able to figure out if something is a triangle for example if they would give me {8,24,25}? --------- Figure out what? Area? Perimeter? Angles?
 Linear-systems/569202: What are the solutions to the equation below: |2x+3|-5=12 I have chosen x=-5 or x=71 solutions Answer 367248 by Alan3354(31518)   on 2012-02-07 16:58:54 (Show Source): You can put this solution on YOUR website!What are the solutions to the equation below: |2x+3|-5=12 I have chosen x=-5 or x=7 -------------- Check your answers. |2x+3|-5=12 x = -5 |-10 + 3 |- 5 =? 12 |-7| - 5 =? 12 7-5 =? 12 Nope. =============== |2x+3|-5=12 x = 7 |14 + 3| - 5 =? 12 17 - 5 = 12 *** 7 is correct ============== You don't choose, you figure them out.
 Linear-systems/569135: Which is the solution to the system? x+5y = -15 y = 1/5x + 1 Below is how I solved it: x+5(1/5x+1)=-15 x+(x+5)=-15 x^2+5=-15 x^2+5-5=-15-5 x^2=-20 Is this correct ? 1 solutions Answer 367237 by Alan3354(31518)   on 2012-02-07 15:20:46 (Show Source): You can put this solution on YOUR website!x+5y = -15 y = 1/5x + 1 Below is how I solved it: x+5(1/5x+1)=-15 x+(x+5)=-15 x^2+5=-15 x^2+5-5=-15-5 x^2=-20 Is this correct ? ----------------- x+5(1/5x+1)=-15 Sub for y is good. x+(x+5)=-15 This is correct. x^2+5=-15 *** Don't multiply, add. ============= 2x+5 = -15 2x = -20 x = -10 ============= x^2+5-5=-15-5 x^2=-20
 Graphs/569088: solve using either addition or subtraction method 4x-6y= 5 2x-3y= 71 solutions Answer 367233 by Alan3354(31518)   on 2012-02-07 14:31:36 (Show Source): You can put this solution on YOUR website!solve using either addition or subtraction method 4x-6y= 5 2x-3y= 7 ------------ Multiply the 2nd eqn by 2. 4x-6y= 5 4x-6y= 7 ------------ The lines are parallel, --> inconsistent, no solution.
 Quadratic_Equations/569093: how do i find the solution of x2-x+3/16=0 by factoring?1 solutions Answer 367228 by Alan3354(31518)   on 2012-02-07 14:25:44 (Show Source): You can put this solution on YOUR website!how do i find the solution of x2-x+3/16=0 by factoring? -------------- (x - 1/4)*(x - 3/4) = 0
 Quadratic_Equations/569115: How do you solve this quadratic equation explain process. te{5/3,3/2}1 solutions Answer 367226 by Alan3354(31518)   on 2012-02-07 14:21:19 (Show Source): You can put this solution on YOUR website!How do you solve this quadratic equation explain process. te{5/3,3/2} ----------------- What equation?
 Linear-equations/569096: solve the system by graphing 2x+y=-7 & 5x+4y=-13. I How do I solve the problems to get the solutions to graph.1 solutions Answer 367224 by Alan3354(31518)   on 2012-02-07 14:19:14 (Show Source): You can put this solution on YOUR website!solve the system by graphing 2x+y=-7 & 5x+4y=-13. I How do I solve the problems to get the solutions to graph. -------------- You don't "get the solution to graph." You graph the 2 equations. Each is a straight line. Every point on the line is a solution to that equation. --- Where they intersect, the point that's on both equations, is the solution to the system of equations. ----------- 2x+y=-7 y = -2x - 7 You need 2 points for a straight line. Pick 2 values for x and find y. Plot the 2 points. Draw a line thru them. ==================== Do the same for the other equation.
 logarithm/569119: I need help on how to show my work when solving this problem: e^.05t = 16001 solutions Answer 367222 by Alan3354(31518)   on 2012-02-07 14:13:03 (Show Source): You can put this solution on YOUR website! Take the log of both sides 0.05t = ln(1600) =~ 7.37776 t =~ 147.555
 Average/569105: The earliest mechanical clock appeared around 1350 in europe and would gain or lose and average of 30 minutes per day. After that, accuracy roughly doubled every 30 years. find the predicted accuracy of the clock in the years 1700 and 2000. 1 solutions Answer 367221 by Alan3354(31518)   on 2012-02-07 14:08:39 (Show Source): You can put this solution on YOUR website!The earliest mechanical clock appeared around 1350 in europe and would gain or lose and average of 30 minutes per day. After that, accuracy roughly doubled every 30 years. find the predicted accuracy of the clock in the years 1700 and 2000. ---------------- "accuracy...doubled..." is not a good term. If the accuracy is 10%, then double that is 20% ?? ---- If you mean the error was reduced by a factor of 2: 1350 - 1700 = 350 yrs 350/30 =~ 12 periods 30 mins error * (1/2)^12 = 30/1024 =~ 0.03 min/day = 1.8 seconds/day ------------ 1350 - 2000 = 650 yrs = 22.7 periods 30 min*(1/2)^22.7 =~ 4.403E-6 min/day =~ 264 microseconds/day
 Polygons/569103: why can't the size of the angle at the centre of a regular polygon be 25 degrees?1 solutions Answer 367215 by Alan3354(31518)   on 2012-02-07 13:52:39 (Show Source): You can put this solution on YOUR website!why can't the size of the angle at the centre of a regular polygon be 25 degrees? ------------ 360/25 is not an integer. A polygon can't have 14.4 sides.
 Probability-and-statistics/569104: Could someone please help me write an equation to describe the exponential function as y=ab^x The base is 5. The graph passes through the point(1,2) Thank you for taking the time to help me!1 solutions Answer 367213 by Alan3354(31518)   on 2012-02-07 13:44:13 (Show Source): You can put this solution on YOUR website!Could someone please help me write an equation to describe the exponential function as y=ab^x The base is 5. The graph passes through the point(1,2) -------------- a = 0.4 -->
 Numeric_Fractions/569025: hey tutors i need to know what 11 1\9% as a fraction thanks Blake1 solutions Answer 367200 by Alan3354(31518)   on 2012-02-07 10:49:22 (Show Source): You can put this solution on YOUR website! 11 1\9% as a fraction --------------- = 9*(11 1/9) = 100 --> 11 1/9% = 100%/9 --> 1/9 ======= That make sense? Or try this: 11 1/9 = 11.111...% repeating 1's Divide by 100 --> 0.111... as a repeating decimal 1n = 0.111111..... 10n = 1.11111..... -1n =-0.11111.... ------------------ Subtract 9n = 1 n = 1/9
 Linear-equations/569035: Write the equation of a line parallel to and passing through (2,1).1 solutions Answer 367199 by Alan3354(31518)   on 2012-02-07 10:36:28 (Show Source): You can put this solution on YOUR website!Write the equation of a line parallel to and passing through (2,1). --------- Parallel to what?
 Quadratic_Equations/569015: One leg of a right triangle is 7 miles longer than the other. The hypotenuse is equal to 13 miles. How long is the shorter leg? The correct answer is 5 miles. please help me see how to do this!1 solutions Answer 367198 by Alan3354(31518)   on 2012-02-07 09:36:45 (Show Source): You can put this solution on YOUR website!One leg of a right triangle is 7 miles longer than the other. The hypotenuse is equal to 13 miles. How long is the shorter leg? ----------------
 Numeric_Fractions/568831: How do you figure out what 3/4-1/6 is?1 solutions Answer 367136 by Alan3354(31518)   on 2012-02-06 21:10:28 (Show Source): You can put this solution on YOUR website!How do you figure out what 3/4-1/6 is? ------ Find a common denominator. The product always works. = 7/12
 Exponents/568807: (2x2)-4 answer should contain only positive exponents1 solutions Answer 367130 by Alan3354(31518)   on 2012-02-06 20:48:49 (Show Source): You can put this solution on YOUR website!(2x2)-4 answer should contain only positive exponents ------ Is 2x2 ? Or ?
 Pythagorean-theorem/568719: What to do when both legs are x? 1 solutions Answer 367129 by Alan3354(31518)   on 2012-02-06 20:47:43 (Show Source): You can put this solution on YOUR website!What to do when both legs are x? ------------- What are you asked to do?
 Age_Word_Problems/568729: Both digits are the same. It is less than 50. The sum of its digits is 61 solutions Answer 367123 by Alan3354(31518)   on 2012-02-06 20:19:11 (Show Source): You can put this solution on YOUR website!Both digits are the same. It is less than 50. The sum of its digits is 6 ------------ 6/2 = 3 ----------- "Both digits are the same." Can one digit be the same?
 Trigonometry-basics/568765: (cscx+ cotx)(1-cosx)=sinx I don't know how to proove the question. I tried and got a different answer. Can you help me?1 solutions Answer 367122 by Alan3354(31518)   on 2012-02-06 20:17:48 (Show Source): You can put this solution on YOUR website!(cscx+ cotx)(1-cosx)=sinx --------- Change everything to sines and cosines.
 Average/568769: what grade would i have if i got 15% wrong on my test in math1 solutions Answer 367120 by Alan3354(31518)   on 2012-02-06 20:16:47 (Show Source): You can put this solution on YOUR website!what grade would i have if i got 15% wrong on my test in math ----------- It depends on what grade 85% is. It varies with classes and teachers.
 Mixture_Word_Problems/568648: A market sells coffee from Brazil for \$3 per pound and coffee from colombia for \$4 per pound. How many pounds of each should be used in order to sell the blend of 100 pounds for \$3.50 per pound?1 solutions Answer 367072 by Alan3354(31518)   on 2012-02-06 18:56:01 (Show Source): You can put this solution on YOUR website!A market sells coffee from Brazil for \$3 per pound and coffee from colombia for \$4 per pound. How many pounds of each should be used in order to sell the blend of 100 pounds for \$3.50 per pound? ------------- \$3.50 is the average, so it's equal amounts.
 Numeric_Fractions/568664: What does 207 over 273 come out to be a simplifed fraction1 solutions Answer 367071 by Alan3354(31518)   on 2012-02-06 18:54:54 (Show Source): You can put this solution on YOUR website!What does 207 over 273 come out to be a simplifed fraction ---------- Both have a factor of 3