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# Recent problems solved by 'Alan3354'

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 Rational-functions/335979: The graph of the parabola y = -2(x -1)2 + 3 is symmetric about a line. What is the equation of that line?1 solutions Answer 240958 by Alan3354(30993)   on 2010-08-28 19:11:35 (Show Source): You can put this solution on YOUR website!x = 1
 Graphs/335914: 3x=5y=-11 x-2=111 solutions Answer 240951 by Alan3354(30993)   on 2010-08-28 18:26:32 (Show Source): You can put this solution on YOUR website!3x=5y=-11 Too many equal signs.
 Polynomials-and-rational-expressions/335854: (6x-1)1 solutions Answer 240888 by Alan3354(30993)   on 2010-08-28 11:07:27 (Show Source): You can put this solution on YOUR website!What about it?
 Numbers_Word_Problems/335858: Juan carried an odd number of dimes in hi pocket and aneven number of nickels, which of the following numbers might represent the amount of money jaun had in his pocket? 1 solutions Answer 240887 by Alan3354(30993)   on 2010-08-28 11:06:42 (Show Source): You can put this solution on YOUR website!No numbers are given.
 Equations/335861: Denny walks 60 m in one min , john walks 210 m in one min, if denny has already walked 1800m , how many mins it will take for john to catch up with denny,1 solutions Answer 240886 by Alan3354(30993)   on 2010-08-28 11:06:03 (Show Source): You can put this solution on YOUR website!It depends on the directions they're moving.
 Linear-equations/335866: Brenda and Gillian live 1 mile apart along the same street. Brenda walks at a rate of 3 miles per hour and Gillian walks at a rate of 2.5 miles per hour. If they each leave their own house at the same time, how long, to the nearest minute, will it take for them to meet? 1 solutions Answer 240885 by Alan3354(30993)   on 2010-08-28 11:05:02 (Show Source): You can put this solution on YOUR website!Are they walking towards each other? Or in the same direction? In different directions?
 Numeric_Fractions/335862: Hello, I have a question in regards to simplifying fractions. Problem is 5/8x + 1/16x =11/16+x I came up with x=88/80 and I was asked to simplify the answer, so because it is an improper fraction I turned it into a mixed number of 1 and(8/80), then I reduced it to 1 and(1/10). Can you please tell me if it is necessary to turn the problem into a mixed number? Thanks in advance1 solutions Answer 240884 by Alan3354(30993)   on 2010-08-28 11:00:09 (Show Source): You can put this solution on YOUR website!It's not necessary unless someone asks for it. 11/10 is better than a mixed number, imo. ---------- 5/8x + 1/16x =11/16+x Is it (5/8)x ? Or 5/(8x) ? --------------------------- 11x/16 = x + (11/16) 11x = 16x + 11 -5x = 11 x = -11/5
 Graphs/335863: M=5/6,(9,-3) y=1 solutions Answer 240883 by Alan3354(30993)   on 2010-08-28 10:58:17 (Show Source): You can put this solution on YOUR website!What is your question?
 Points-lines-and-rays/335865: Please tell me if I am right and if not, show me the answer please. Find the length of the following segment created by these pairs of endpoints! (1,2) and (7,2) I believe it goes like this (1+7)/2=8 and (2+2)/2=4/2=2 Solution is (8,2) Correct? 1 solutions Answer 240882 by Alan3354(30993)   on 2010-08-28 10:57:18 (Show Source): You can put this solution on YOUR website!Please tell me if I am right and if not, show me the answer please. Find the length of the following segment created by these pairs of endpoints! (1,2) and (7,2) I believe it goes like this (1+7)/2=8 and (2+2)/2=4/2=2 Solution is (8,2) Correct? ---------------------------- You found a point, not the length. Since y is 2 for both given points, the length is 6 (7-1). ------------ It appears you were finding the midpoint, but you didn't divide the x values by 2. (1+7)/2 = 4, not 8.
 Trigonometry-basics/335706: sin(3pi/4) cot(3pi/4) csc(3pi/4)1 solutions Answer 240859 by Alan3354(30993)   on 2010-08-28 07:48:51 (Show Source): You can put this solution on YOUR website!sin(3pi/4) cot(3pi/4) csc(3pi/4) ----------- 3pi/4 radians = 135º Using a calculator: sin = sqrt(2)/2 cot = 1/tan = -1 csc = 1/sin = sqrt(2)
 Equations/335815: solve for a n= 357/174+a1 solutions Answer 240846 by Alan3354(30993)   on 2010-08-28 05:55:00 (Show Source): You can put this solution on YOUR website!solve for a n= 357/174+a a = n - (357/174)
 Numbers_Word_Problems/335822: how many odd 2 digit numbers are there greater than 301 solutions Answer 240844 by Alan3354(30993)   on 2010-08-28 05:53:44 (Show Source): You can put this solution on YOUR website!how many odd 2 digit numbers are there greater than 30 ----------- 31 to 99 --> 69 numbers 35 odd numbers
 Equations/335834: Hi all, im having trouble with the following problem: The energy stored in a spring is given by the formula: E = 100x^2 where x is the compression. The rate of change of energy with respect to the compression is called the thrust T of the spring. How do I: a) Express the thrust Ta of the spring in terms of x. b) Find the thrust at x:1.5 Any help would be fantastic. -Nick1 solutions Answer 240841 by Alan3354(30993)   on 2010-08-28 05:45:45 (Show Source): You can put this solution on YOUR website!The energy stored in a spring is given by the formula: E = 100x^2 where x is the compression. The rate of change of energy with respect to the compression is called the thrust T of the spring. How do I: a) Express the thrust Ta of the spring in terms of x. T = 1st derivative dE/dx = 200x ------------------------------- b) Find the thrust at x:1.5 = 200*1.5 = 300 (no units given)
 Percentage-and-ratio-word-problems/335734: Why is simple interest rate of 13% on a loan for one year higher. Than a 1% interest rate on a monthly balance at the end of each month for one year Thanky you 1 solutions Answer 240763 by Alan3354(30993)   on 2010-08-27 17:15:09 (Show Source): You can put this solution on YOUR website!1% per month for 12 months = That's 12.68% interest. ------------------------- As for "why", why is 7 more than 6?
 Volume/335728: a rectangular container measuring 10cm x 20cm x 25cm is filled with water. What is the mass of this volume of water in kilograms and in grams.1 solutions Answer 240762 by Alan3354(30993)   on 2010-08-27 17:12:56 (Show Source): You can put this solution on YOUR website!Find the volume in cc (cubic centimeters) The density of water is 1 gm/cc 1 kg = 1000 grams
 expressions/335735: are these two problems the same? 2 + 3 x (5 - 2) and 2 + 3(5-2)1 solutions Answer 240761 by Alan3354(30993)   on 2010-08-27 17:10:16 (Show Source): You can put this solution on YOUR website!Yes. Don't use x for multiply, use the asterisk. = 2 + 3*(5 - 2) x is used for a variable, and using it for multiply causes confusion.
 Triangles/335453: Billy's school is 45 miles from the center of Boston, Massachusetts, and 38 miles from the center of Providence, Rhode Island. With this information, you know that the cities are between _?_ and _?_ miles apart.1 solutions Answer 240650 by Alan3354(30993)   on 2010-08-27 11:56:45 (Show Source): You can put this solution on YOUR website!7 and 83, the difference and the sum
 Evaluation_Word_Problems/335423: How much pure gold should be mixed with 12 karat gold to obtain 72 grams of 18 karat gold?1 solutions Answer 240644 by Alan3354(30993)   on 2010-08-27 11:41:32 (Show Source): You can put this solution on YOUR website!Pure gold is 24 karat. 18 is the midpoint between 12 & 24, so equal amounts. 36 grams of each
 Angles/335636: The sum of the measures of two exterior angles of a triangle is 276. What is the measure of the third exterior angle?1 solutions Answer 240643 by Alan3354(30993)   on 2010-08-27 11:31:47 (Show Source): You can put this solution on YOUR website!The sum of exterior angles of ALL polygons is 360 360 - 276 = 84 degs
 Geometry_Word_Problems/335590: A rectangular parking lot is 110 yards and 45 yards wide. it costs about \$.60 to pave each square foot of the parking lot with asphalt. about how much will it cost to pave the parking lot ?1 solutions Answer 240602 by Alan3354(30993)   on 2010-08-27 10:05:28 (Show Source): You can put this solution on YOUR website!A = L*W A = 110*3 ft*45*3 ft A = 44550 sq ft \$0.60 times 44550 = \$26730
 Linear-equations/335612: how do you find the point of a slope of a line that contain the given points of (-3/4,-1/4) and (2/7,-5/7)1 solutions Answer 240601 by Alan3354(30993)   on 2010-08-27 10:01:09 (Show Source): You can put this solution on YOUR website!how do you find the point of a slope of a line that contain the given points of (-3/4,-1/4) and (2/7,-5/7) -------------------- There's no point to find. You have 2 points, you can find the slope. slope = m = diffy/diffx Find the difference in y and divide it by the difference in x. m = (-1/4 - (-5/7))/(-3/4 - 2/7)
 decimal-numbers/335551: State how much larger or smaller the first unit is than the second. centiliter, microliter Choose one answer. a. Smaller by a factor of 1000 b. Smaller by a factor of 10,000 c. Larger by a factor of 10,000 d. Larger by a factor of 1000 1 solutions Answer 240592 by Alan3354(30993)   on 2010-08-27 09:30:04 (Show Source): You can put this solution on YOUR website!A centiliter = 0.01 liters (seldom used) A microliter = 0.000001 liters ------------------ 1 centiliter = 10000 microliters
 Expressions-with-variables/335584: how to write k+2.5 in a alegbra expression1 solutions Answer 240587 by Alan3354(30993)   on 2010-08-27 09:22:51 (Show Source): You can put this solution on YOUR website!That's it. k + 2.5
 Quadratic_Equations/335604: Determine the equation of the axis of symmetry. y = -5x2 - x + 9 what is the answer to this ? ive tried multiple times and im almost out of timeeeee ?1 solutions Answer 240585 by Alan3354(30993)   on 2010-08-27 09:16:40 (Show Source): You can put this solution on YOUR website! Determine the equation of the axis of symmetry. y = -5x2 - x + 9 ------------------ x = -b/2a is the axis of symmetry x = 1/(-10) x = -1/10
 Travel_Word_Problems/335589: A circular path has a diameter of 120 meters. your average walking speed is 4 kilometers per hour . about how many minutes will it take you to walk around the path 3 times ?1 solutions Answer 240583 by Alan3354(30993)   on 2010-08-27 09:12:47 (Show Source): You can put this solution on YOUR website!A circular path has a diameter of 120 meters. your average walking speed is 4 kilometers per hour . about how many minutes will it take you to walk around the path 3 times ? -------------- 120 meters = 0.12 km Circumference = pi*d = 0.12pi km 0.12pi km/4 km/hr = 0.03pi hours per orbit x 3 = 0.09pi hours 0.09pi hours = 5.4*pi minutes =~ 17 minutes
 Equations/335473: 6-3 squared x5-3=-36 how? 1 solutions Answer 240464 by Alan3354(30993)   on 2010-08-26 21:04:47 (Show Source): You can put this solution on YOUR website!I don't know what that means. Is the x a variable?
 Functions/335390: how would you translate the phrase " the number of inches in any number of feet" into an algebraic expression? 1 solutions Answer 240392 by Alan3354(30993)   on 2010-08-26 18:50:24 (Show Source): You can put this solution on YOUR website!Inches = 12*feet i = 12f
 Linear-equations/335261: x/x^2-9 + 4/x+3 = 3/x^2-9 My answer is x^2=9 May I please ask for assistance? Thank you in advance. 1 solutions Answer 240302 by Alan3354(30993)   on 2010-08-26 13:29:26 (Show Source): You can put this solution on YOUR website! Multiply thru by x^2 - 9 x + 4(x-3) = 3 5x - 12 = 3 5x = 15 x = 3
 Unit_Conversion_Word_Problems/335217: Convert 77 degree Fahrenheit to Celsuis1 solutions Answer 240250 by Alan3354(30993)   on 2010-08-26 09:45:19 (Show Source): You can put this solution on YOUR website!25º C
 Exponents/335190: If y>x z 1 solutions Answer 240229 by Alan3354(30993)   on 2010-08-26 08:51:28 (Show Source): You can put this solution on YOUR website!Yea, if. But we can't be certain.