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Alan3354 answered: 30973 problems
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Linear-systems/298760: Need help in solving this equation by addition 2y + z = 4 x -3y + 2z =9 -y =3 1 solutions Answer 214814 by Alan3354(30993)   on 2010-04-30 11:13:37 (Show Source): You can put this solution on YOUR website! 2y + z = 4 x -3y + 2z =9 -y =3 -------------- y = -3 ------ 2y + z = 4 -6 + z = 4 Add 6 to both sides, that's addition z = 10 --------- x +9 + 20 = 9 x = -20 -------

logarithm/298731: Solve 5^x=6^x-1 1 solutions Answer 214803 by Alan3354(30993)   on 2010-04-30 09:14:40 (Show Source): You can put this solution on YOUR website! x*log(5) = (x-1)*log(6) = x*log(6) - log(6) x*log(5) - x*log(6) = -log(6) x*(log(6) - log(5)) = log(6) x*log(6/5) = log(6) x = log(6)/log(6/5) x =~ 9.827469

logarithm/298732: Solve 3^2x+1 = 27 1 solutions Answer 214802 by Alan3354(30993)   on 2010-04-30 09:11:09 (Show Source): You can put this solution on YOUR website! 2x+1 = 3 x = 2

Graphs/298736: HOW DO YOU PUT Y=3 INTO SLOPE INTERCEPT FORM? 1 solutions Answer 214801 by Alan3354(30993)   on 2010-04-30 09:06:38 (Show Source): You can put this solution on YOUR website! That is slope-intercept form y = 0x + 3 y = 3 The slope is 0, parallel to the x-axis The y-int is 3.

logarithm/298644: Please help me solve this equation its an Algebra II Logarithm, 1 solutions Answer 214762 by Alan3354(30993)   on 2010-04-29 22:19:36 (Show Source): You can put this solution on YOUR website! 2n*log(2) = (n-2)*log(3) 2n*log(2) = n*log(3) - 2log(3) 2nlog(2) - nlog(3) = -log(9) n*(log(3) - log(4)) = log(9) n = log(9)/(log(3) - log(4)) n =~ -7.63768

Geometry_proofs/298622: write the equation of the circles below, A) center (0,0) radius 12. and B) (-2,6) with radius 6 square rooted. like the v with line on top over the number 1 solutions Answer 214756 by Alan3354(30993)   on 2010-04-29 21:26:31 (Show Source): You can put this solution on YOUR website! write the equation of the circles below, A) center (0,0) radius 12 ------------------ and B) (-2,6) with radius sqrt(6)

logarithm/298623: I need to solve " Log base 11 of x is 1/3 ". So far I've gotten , although my book says the answer is 5. I don't know how they came to this conclusion and wish to have it clarified. Please. 1 solutions Answer 214755 by Alan3354(30993)   on 2010-04-29 21:23:58 (Show Source): You can put this solution on YOUR website! I need to solve " Log base 11 of x is 1/3 ". x =~ 2.22398 -------------- It's not 5. Sometimes the book is wrong.

logarithm/298591: Solve 5^=6^x-1 1 solutions Answer 214753 by Alan3354(30993)   on 2010-04-29 21:20:27 (Show Source): You can put this solution on YOUR website! What's the exponent of 5?

Angles/298556: An ice cube that measures 2.3 centimeters on each side contains how many cubic centimeters of ice? Include correct units with your solution. 1 solutions Answer 214736 by Alan3354(30993)   on 2010-04-29 20:15:17 (Show Source): You can put this solution on YOUR website! It's the product of the sides. = = 12.167 cc or 12.167 milliliters

Travel_Word_Problems/298580: A train leaves Watsonville at noon traveling north at 44 mph. One hour later, another train, going 52 mph, travels north on a parallel track. How many hours will the second train travel before it overtakes the first train? 1 solutions Answer 214735 by Alan3354(30993)   on 2010-04-29 20:13:07 (Show Source): You can put this solution on YOUR website! The 1st train is 44 miles away. The 2nd train gains on it at 8 mph 44/8 = 5.5 hours

Polynomials-and-rational-expressions/298573: An ant marches from point A to point B on the cylindrical garbage can shown in the accompanying figure. The can is 1 foot in diameter and 2 feet high. If the ant makes two complete revolutions of the can in a perfect spiral, then exactly how far did he travel? 1 solutions Answer 214732 by Alan3354(30993)   on 2010-04-29 20:10:53 (Show Source): You can put this solution on YOUR website! No figure is shown.

Polynomials-and-rational-expressions/298574: An ant marches from point A to point B on the cylindrical garbage can shown in the accompanying figure. The can is 1 foot in diameter and 2 feet high. If the ant makes two complete revolutions of the can in a perfect spiral, then exactly how far did he travel? 1 solutions Answer 214730 by Alan3354(30993)   on 2010-04-29 20:08:47 (Show Source): You can put this solution on YOUR website! No figure is shown.

Miscellaneous_Word_Problems/298566: An object's altitude, in meters, is given by the polynomial h + vt - 9.8t2, where h is the height in meters from which the launch occurs, v is the initial upward speed in meters per second, and t is the number of seconds for which the rocket is airborne. A pebble is shot upward from the top of a building 150 meters tall. If the initial speed is 35 meters per second, how high above the ground will the pebble be after 3 seconds? Round results to the nearest tenth of a meter. 1 solutions Answer 214723 by Alan3354(30993)   on 2010-04-29 20:03:11 (Show Source): You can put this solution on YOUR website! An object's altitude, in meters, is given by the polynomial h + vt - 9.8t2, where h is the height in meters from which the launch occurs, v is the initial upward speed in meters per second, and t is the number of seconds for which the rocket is airborne. A pebble is shot upward from the top of a building 150 meters tall. If the initial speed is 35 meters per second, how high above the ground will the pebble be after 3 seconds? Round results to the nearest tenth of a meter. ------------------- A pebble is not a rocket. h(3) = -9.8*9 + 35*3 + 150 h(3) = 166.8 meters (not rounded)

Polygons/298509: What is the area of a 15-gon with a perimeter of 90ft? 1 solutions Answer 214698 by Alan3354(30993)   on 2010-04-29 18:29:19 (Show Source): You can put this solution on YOUR website! What is the area of a 15-gon with a perimeter of 90ft? ---------- s = 90/15 = 6 (length of each side) The area of any regular polygon with n sides of length s is: A = 135/tan(12) =~ 635.125 sq ft

Surface-area/298461: i just need to surface area of a clyinder radius=9m height:22.5m 1 solutions Answer 214689 by Alan3354(30993)   on 2010-04-29 17:56:29 (Show Source): You can put this solution on YOUR website! The area of the top is sq meters Same for the top. The rest of it is the circumference * height = 2*pi*r*h = 405pi sq meters

Rational-functions/298407: 2^2 / 2^4 It's not .25, that's not correct. I've tried 2, 2^2 and that isn't right either. 1 solutions Answer 214663 by Alan3354(30993)   on 2010-04-29 16:01:17 (Show Source): You can put this solution on YOUR website! = 4/16 = 1/4 ------------ = =~ 1.0905077

Distributive-associative-commutative-properties/298381: I need help solving this question, 3(x+y)+ a( x+y) 1 solutions Answer 214657 by Alan3354(30993)   on 2010-04-29 14:55:40 (Show Source): You can put this solution on YOUR website! Solve for what?

Quadratic-relations-and-conic-sections/298346: If a right circular cone intersects a plane that runs parallel to the edge of the cone, the resulting curve will be a(n) _____. A. hyperbola B. circle C. ellipse D. parabola 1 solutions Answer 214650 by Alan3354(30993)   on 2010-04-29 13:53:38 (Show Source): You can put this solution on YOUR website! It's a parabola. If the plane is parallel to the axis, it's a hyperbola.

Expressions-with-variables/298276: how do you complete this I am stuck 10y^2+11y-6 I see where you get the 10 y and the 6 from but the 11y has got me stuck? 1 solutions Answer 214625 by Alan3354(30993)   on 2010-04-29 10:28:43 (Show Source): You can put this solution on YOUR website! Complete it in what sense?

logarithm/298271: Evaluate 10^log5 (log 5 is the exponent) 1 solutions Answer 214624 by Alan3354(30993)   on 2010-04-29 10:27:40 (Show Source): You can put this solution on YOUR website! = 5 ------- The definition of logs

Radicals/298257: Need help! I've gotten this far.. i factored and i got (x-4) (x-4).. but these are non of the answers in my practice test, maybe i didnt something wrong along the way,if anyone could help please. 1 solutions Answer 214619 by Alan3354(30993)   on 2010-04-29 09:52:11 (Show Source): You can put this solution on YOUR website!

Graphs/298252: Exactly how many cubic centimeters of ice cream can an ice cream cone hold (within the cone) if its height is 6.4 centimeters and the radius of its base is 1.5 centimeters? Include correct units with your solution. Use "pi" for π. 1 solutions Answer 214617 by Alan3354(30993)   on 2010-04-29 09:34:41 (Show Source): You can put this solution on YOUR website! Plug in r and h, figure it out.

Graphs/298231: Any help would be greatly appreciated, I am having difficulties figuring this out and graphing. I am not good at doing graphs or figuring them out. Please help. Find the equations for the following lines and then graph them using any graphing utility Parallel to 6x - 4y + 12 = 0, and passing through the line x = 3 Eric 1 solutions Answer 214607 by Alan3354(30993)   on 2010-04-29 08:52:10 (Show Source): You can put this solution on YOUR website! "passing thru the line" makes no sense.

Exponential-and-logarithmic-functions/298210: Is -7X10^11 in scientific notation? If not, please put in scientific notation. 1 solutions Answer 214602 by Alan3354(30993)   on 2010-04-29 08:29:29 (Show Source): You can put this solution on YOUR website!

Exponential-and-logarithmic-functions/298209: Is -7X10^11 in scientific notation? If not, please put in scientific notation. 1 solutions Answer 214597 by Alan3354(30993)   on 2010-04-29 08:19:58 (Show Source): You can put this solution on YOUR website! It is close. -7.0*10^11 might be better. -7.0E11 is more convenient, and commonly used.

Square-cubic-other-roots/298110: (3+2i) + (6-4i) 1 solutions Answer 214536 by Alan3354(30993)   on 2010-04-28 21:18:56 (Show Source): You can put this solution on YOUR website! (3+2i) + (6-4i) --------------- = 9-2i

Radicals/298091: I Need Help With This Problem What i've Gotten so far is.. 1 solutions Answer 214529 by Alan3354(30993)   on 2010-04-28 20:48:42 (Show Source): You can put this solution on YOUR website! Done.

Numeric_Fractions/297872: what is the some of 6 1/6 + 2 1/3 1 solutions Answer 214528 by Alan3354(30993)   on 2010-04-28 20:48:15 (Show Source): You can put this solution on YOUR website! what is the some of 6 1/6 + 2 1/3 ------------- = 6 1/6 + 2 2/6 = 8 3/6 = 8 1/2 --------- PS It's the sum, not the some.

Radicals/298086: I Need Help With This Problem What i've Gotten so far is.. 1 solutions Answer 214526 by Alan3354(30993)   on 2010-04-28 20:39:01 (Show Source): You can put this solution on YOUR website! = =

Matrices-and-determiminant/298032: I have no clue how to do matrices and I do not have a calculator in order to compute the equations any help would be great. Solve any way you can: 2x – y + z = 8 x + 2y + z = -3 x - 2y – z = 7 Eric 1 solutions Answer 214514 by Alan3354(30993)   on 2010-04-28 19:46:26 (Show Source): You can put this solution on YOUR website! 2x – y + z = 8 x + 2y + z = -3 x - 2y – z = 7 ------------------ x + 2y + z = -3 x - 2y – z = 7 ---------------- Add 2x = 4 x = 2 ------ -y + z = 4 eqn 1 -2y- z = 5 eqn 3 ---------------- Add -3y = 9 y = -3 -------- 2 -2*(-3) - z = 7 8 - z = 7 z = 1 +++++++++++++++++++++ You mentioned matrices, but I used elimination. The coefficients were too good to pass up.

Polynomials-and-rational-expressions/298042: (2x+3)^1.8=250 Solve for x 4 decimal places. I did not understand the answer I got. 1 solutions Answer 214510 by Alan3354(30993)   on 2010-04-28 19:33:19 (Show Source): You can put this solution on YOUR website! (2x+3)^1.8=250 --------------- If you don't understand it, how did you get it? (2x+3)^1.8=250 Take the "1.8 root" of both sides. The 1.8 root of 250 = 2x+3 = 21.48764863 x =~ 9.2438