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# Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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 Equations/314299: what is the equation to 5+2x=371 solutions Answer 224676 by Alan3354(30993)   on 2010-06-14 18:34:58 (Show Source): You can put this solution on YOUR website!I don't know what that means. I don't think it's my fault.
 test/314278: How would you simplify 5 over the cube root of 36?1 solutions Answer 224675 by Alan3354(30993)   on 2010-06-14 18:34:20 (Show Source): You can put this solution on YOUR website!How would you simplify 5 over the cube root of 36? --------------- I would multiply the numerator and denominator by the cube root of 6. = 5*cr(6)/cr(216) = 5*cr(6)/6
 test/314287: Y= 3x-41 solutions Answer 224674 by Alan3354(30993)   on 2010-06-14 18:31:59 (Show Source): You can put this solution on YOUR website!Do you have a question?
 Problems-with-consecutive-odd-even-integers/314294: find the lesser of two consecutive integers with the sum greater than 16.1 solutions Answer 224673 by Alan3354(30993)   on 2010-06-14 18:27:31 (Show Source): You can put this solution on YOUR website!find the lesser of two consecutive integers with the sum greater than 16. ----------- There's no solution to this. The integers can be 677 & 678, or 17888 & 17889, or any pair of numbers with the smaller one greater than or equal to 8.
 logarithm/314297: what is the value of log,271 solutions Answer 224672 by Alan3354(30993)   on 2010-06-14 18:24:59 (Show Source): You can put this solution on YOUR website!I used a calculator. I pressed 2, then 7, then log, and it says 1.431363764 You should get a calculator.
 test/314055: I need help with these problems!!!! PLEASE i have no clue. 1. -x/6 +4 < 1 2. ADD (2b-4) +(8b-6) 3. 6-6(x-2)= 3(3x+1) 4. Subtract (6b+1)-(2b+4) 5. 3y^2(2y^2-1) 6. (-5a^3b)(-ab^2)^3 7. 7x+3x^2-8x = 0 8. (3x^2y^-1)^3/ 18x^3y^2 9. The solution to (x+3)^2 - 25= 0 10. What is the discriminate of 2x^2 - 3x -5 = 0???? Please help me get these answers. 1 solutions Answer 224513 by Alan3354(30993)   on 2010-06-13 22:17:00 (Show Source): You can put this solution on YOUR website!9. The solution to (x+3)^2 - 25= 0 10. What is the discriminate of 2x^2 - 3x -5 = 0???? ------------------- How can you have problems like 9 and 10, when you don't know how to do #2 and #3? ------------- Getting the answers won't be much help. 9. The solution to (x+3)^2 - 25= 0 (x+3)^2 = 25 Take the square root of both sides x+3 = ± 5 x = 2 x = -8 ----------- 10. What is the discriminate of 2x^2 - 3x -5 = 0???? It's discriminant. Disc = b^2 - 4ac = 9 - 4*2*(-5) = 9 + 40 Disc = 49
 Trigonometry-basics/314056: an airplane is flying an altitude of 10,000 feet. the pilot wants to make a smooth decent to the runway at a constant angle of 4 degrees. how far from the runway should the pilot begin the decent? njdevils1129@gmail.com1 solutions Answer 224512 by Alan3354(30993)   on 2010-06-13 22:11:39 (Show Source): You can put this solution on YOUR website!an airplane is flying an altitude of 10,000 feet. the pilot wants to make a smooth decent to the runway at a constant angle of 4 degrees. how far from the runway should the pilot begin the decent? ---------------- His distance on the ground from the touchdown point is 10000*cot(4) =~ 143007 feet =~ 23.52 nautical miles (planes use knots and nautical miles) ---------------- The distance along the glide path = 10000*csc(4) =~ 143356 feet =~ 23.58 nautical miles
 Linear-systems/313978: (2,7) x+8y=9 The equation of the line is y=1 solutions Answer 224450 by Alan3354(30993)   on 2010-06-13 18:29:20 (Show Source): You can put this solution on YOUR website!Of what line?
 logarithm/313953: what is the value of log2 181 solutions Answer 224448 by Alan3354(30993)   on 2010-06-13 18:26:32 (Show Source): You can put this solution on YOUR website!what is the value of log2 18 ---------- =~ 4.169925
 logarithm/313889: Let log(A) = 5 and log(B) = -25. Find log(A/B)1 solutions Answer 224417 by Alan3354(30993)   on 2010-06-13 15:20:44 (Show Source): You can put this solution on YOUR website!Let log(A) = 5 and log(B) = -25. Find log(A/B) ------------- A = 1E5 (10^5) B = 1E-25 A/B = 1E30 log(A/B) = 30
 logarithm/313840: can you help me solve (e^x - e^(-x))/ (e^x + e^x) = 3. The answer given was ln 2/2 but I can't get that..Thanks 1 solutions Answer 224400 by Alan3354(30993)   on 2010-06-13 12:27:22 (Show Source): You can put this solution on YOUR website!(e^x - e^(-x))/ (e^x + e^x) = 3 (e^x - e^(-x))/ 2e^x = 3 No solution
 Linear-equations/313809: please help me solve the following problem Determine whether the following systems will have one solution no solution or infinitely solutions show algebraic process 1){y=2x {y=2x+5 2){y=2x {y=x+x1 solutions Answer 224383 by Alan3354(30993)   on 2010-06-13 09:07:47 (Show Source): You can put this solution on YOUR website!Determine whether the following systems will have one solution no solution or infinitely solutions show algebraic process 1) y=2x y=2x+5 These have the same slope, so they're parallel. No intersection, no solution. -------- y=2x y=x+x This is one equation written 2 times. --> an infinite # of solutions
 Travel_Word_Problems/313745: If a player runs at a speed of 36.0 km/hr, how many seconds does it take to run from the 50.0 yard line to the 20.0 yard line? 1 solutions Answer 224382 by Alan3354(30993)   on 2010-06-13 08:38:58 (Show Source): You can put this solution on YOUR website!If a player runs at a speed of 36.0 km/hr, how many seconds does it take to run from the 50.0 yard line to the 20.0 yard line? --------------- 36 km/hr = 36000 meters/hr = 10 meters/second ------------ 30 yards = 27.432 meters --> 2.7432 seconds
 Graphs/313715: Evaluate the exponential equation for three positive values of x, three negative values of x, and at x=0. Show your work. Use the resulting ordered pairs to plot the graph; submit the graph. State the equation of the line asymptotic to the graph (if any). y = 1/4^x -3 1 solutions Answer 224381 by Alan3354(30993)   on 2010-06-13 08:35:17 (Show Source): You can put this solution on YOUR website!dl the FREE graph software at http://www.padowan.dk.com
 Graphs/313687: Draw the graphs of 2x-y-1=0 and 2x+y=9; write down the coordinates of the point of intersection of the two lines.1 solutions Answer 224380 by Alan3354(30993)   on 2010-06-13 08:33:18 (Show Source): You can put this solution on YOUR website!dl the FREE graph software at http://www.padowan.dk.com
 logarithm/313683: Express as an equivalent expression, using the individual logarithms of w, x, y, and z. log(a)(1x^2y^5) 1 solutions Answer 224379 by Alan3354(30993)   on 2010-06-13 08:32:15 (Show Source): You can put this solution on YOUR website! Express as an equivalent expression, using the individual logarithms of w, x, y, and z. log(a)(1x^2y^5) ------------ =
 Functions/313696: What is the domain of the function f(x) = 1 solutions Answer 224378 by Alan3354(30993)   on 2010-06-13 08:28:36 (Show Source): You can put this solution on YOUR website!-3 <= x <= 3
 Surface-area/313788: hello how are you? the question today is: the radius of a circle is 8cm. how would i find the surface area & volume?1 solutions Answer 224376 by Alan3354(30993)   on 2010-06-13 08:17:46 (Show Source): You can put this solution on YOUR website!#313756 The area of a circle is = 64pi sq cm =~ 201.06 sq cm ------------ A circle has no volume
 Rate-of-work-word-problems/313795: A reservoir has 3 sources of water. Source A can fill the reservoir in 2 days, source B in 3 days and source C in 6 days. How long would it take to fill the reservoir using all 3 sources?1 solutions Answer 224375 by Alan3354(30993)   on 2010-06-13 08:15:48 (Show Source): You can put this solution on YOUR website!A reservoir has 3 sources of water. Source A can fill the reservoir in 2 days, source B in 3 days and source C in 6 days. How long would it take to fill the reservoir using all 3 sources? --------- A fills 1/2 the reservoir per day B fills 1/3 per day C fills 1/6 per day Add those up 1/2 + 1/3 + 1/6 = 1 = 1 res per day --> 1 day to fill
 Surface-area/313791: the base of a cone is 15cm. the height of the cone is 36cm and the "s" of the cone is 39cm. if the formula 4 volume is (pi)(radius2)(h)/3 how do is solve this1 solutions Answer 224374 by Alan3354(30993)   on 2010-06-13 08:13:57 (Show Source): You can put this solution on YOUR website! the base of a cone is 15cm. the height of the cone is 36cm and the "s" of the cone is 39cm. if the formula 4 volume is (pi)(radius2)(h)/3 how do is solve this ------------ You put in the numbers for radius and height. V = 2700pi V =~ 8482.3 cc
 Polygons/313780: A regular hexagon (a 6 sided polygon with all sides and all angles equal) is inscribed in a circle of radius 1. The area of this hexagon is equal to a (3 sqrt(2))/2 b 3 c 3 sqrt(3) d 6 e none1 solutions Answer 224371 by Alan3354(30993)   on 2010-06-13 07:50:58 (Show Source): You can put this solution on YOUR website!The sides of the hexagon are 1. The area of ANY regular polygon of n sides of length s is = 6cot(30)/4 3sqrt(3)/2
 Inequalities/313770: I need help solving this problem; 2(a+b)? 1 solutions Answer 224369 by Alan3354(30993)   on 2010-06-13 07:08:53 (Show Source): You can put this solution on YOUR website!Solve for what? Equations are solved, this is not one. What do you want to do?
 Numbers_Word_Problems/313781: The last digit of 3^2007 is a 1 b 3 c 5 d 7 e 91 solutions Answer 224368 by Alan3354(30993)   on 2010-06-13 07:03:17 (Show Source): You can put this solution on YOUR website!7 ------- You'll see that if you list the powers of 3 3 9 27 81 etc.
 Surface-area/313756: hello how are you? the question today is: the radius of a circle is 8cm. how would i find the surface area & volume?1 solutions Answer 224361 by Alan3354(30993)   on 2010-06-13 01:11:20 (Show Source): You can put this solution on YOUR website!the radius of a circle is 8cm. how would i find the surface area & volume? ------------- The area of a circle is = 64pi sq cm =~ 201.06 sq cm ------------ A circle has no volume
 Average/313754: Multiply. (6 + x)(2 + 5x) 1 solutions Answer 224359 by Alan3354(30993)   on 2010-06-12 22:42:45 (Show Source):
 Trigonometry-basics/313656: Find all the solutions to the equation. I need help trying to solve the following problem. cos(2theta)+2cos^2(theta/2)=2 1 solutions Answer 224358 by Alan3354(30993)   on 2010-06-12 22:37:56 (Show Source): You can put this solution on YOUR website!cos(2theta)+2cos^2(theta/2)=2 I'll use x, less typing cos(2x)+2cos^2(x/2)=2 cos(2x) = 2cos^2(x) - 1 ------------------------ 2cos^2(x) - 1 + 2cos^2(x/2) = 2 2cos^2(x) + 2cos^2(x/2) = 3 y = x/2 2cos^2(2y) + 2cos^2(y) = 3 2(2cos^2(y) - 1)^2 + 2cos^2(y) = 3 8cos^4(y) - 8cos^2(y) + 2 + 2cos^2(y) = 3 8cos^4(y) - 6cos^2(y) - 1 = 0 A quadratic in cos^2(y) cos^2(y) = 3/8 ± sqrt(17)/8 =~ 0.890388 cos(y) =~ 0.9436038 y =~ ± 19.334º theta =~ ± 38.668º (principal value)
 Miscellaneous_Word_Problems/313688: a giraffe is six times heavier than a lion. a zebra is one-quarter as heavy as a lion. together they are 450kg. how much does each animal weigh? 1 solutions Answer 224351 by Alan3354(30993)   on 2010-06-12 22:04:58 (Show Source): You can put this solution on YOUR website!Is it "6 times heavier", or six times as heavy? --------------------------- 7x = weight of the giraffe x/4 = weight of the zebra x + 7x + x/4=450 Multiply thru by 4 4x+ 28x+ 1x= 1800 33x=1800 x =~ 54.54 lbs (weight of lion) 7x =~ 381.82 lbs (giraffe) x/4 =~ 13.36 lbs (zebra) Totals 450 pounds
 Travel_Word_Problems/313583: . Two trains are 2 kms apart. Speed of one train is 20m/s and the other train is running at 30 m/s .Lengths of the trains are 200 and 300m. In how much time do the trains cross each other? Ans 50 seconds1 solutions Answer 224350 by Alan3354(30993)   on 2010-06-12 22:01:56 (Show Source): You can put this solution on YOUR website!Are they going the same direction?
 Exponents/313692: I need to know what 4,564 is in expanded form using exponents. Thank you.1 solutions Answer 224349 by Alan3354(30993)   on 2010-06-12 22:00:45 (Show Source): You can put this solution on YOUR website!Maybe you mean:
 Numeric_Fractions/313723: How can you tell when a fraction is close to 1/4 and do not refer to decimal numbers1 solutions Answer 224348 by Alan3354(30993)   on 2010-06-12 21:58:53 (Show Source): You can put this solution on YOUR website!How do you define "close" ??
 Radicals/313735: is the relationship correct why or why not? √(x^2+y^2)=x+y1 solutions Answer 224347 by Alan3354(30993)   on 2010-06-12 21:57:39 (Show Source): You can put this solution on YOUR website! Square both sides 2xy = 0 The relationship is NOT true in general. It's true only if x or y or both = zero (0).