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# Recent problems solved by 'Alan3354'

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 Coordinate-system/687960: If the points (-4, 1) and (2, 1) are the endpoints of a diameter of a circle, where is the center? 1 solutions Answer 425433 by Alan3354(30993)   on 2012-12-01 16:13:06 (Show Source): You can put this solution on YOUR website!If the points (-4, 1) and (2, 1) are the endpoints of a diameter of a circle, where is the center? -------------- It's the midpoint of the line. Find the average of x & y separately. For x: (-4 + 2)/2 = -1 y = 1 --------- --> center at (-1,1)
 Geometry_Word_Problems/687955: A rectangle is three times longer than it is wide and the diagonal of it is 50 cm. How long is each side.1 solutions Answer 425429 by Alan3354(30993)   on 2012-12-01 15:14:36 (Show Source): You can put this solution on YOUR website!A rectangle is three times longer than it is wide and the diagonal of it is 50 cm. How long is each side. ----------------- L = 4W
 Rational-functions/687918: Please help... For the function f(x)=3x-7 calculate: f(-4) Thank you1 solutions Answer 425398 by Alan3354(30993)   on 2012-12-01 12:34:06 (Show Source): You can put this solution on YOUR website!For the function f(x)=3x-7 calculate: f(-4) -------------- f(x) = 3x - 7 Sub -4 for x f(-4) = 3*-4 -7 = -19
 Travel_Word_Problems/687903: lisa rides a bicycle 30 miles every 5 hours.at this rate how many hours did lisa ride if she rode 150 miles 1 solutions Answer 425390 by Alan3354(30993)   on 2012-12-01 11:05:00 (Show Source): You can put this solution on YOUR website!lisa rides a bicycle 30 miles every 5 hours.at this rate how many hours did lisa ride if she rode 150 miles ------------- It's 5 times the distance --> 5 times the time.
 Equations/687893: -x-4=10 what does x equal and how do you solve it?1 solutions Answer 425389 by Alan3354(30993)   on 2012-12-01 11:03:55 (Show Source): You can put this solution on YOUR website!-x-4=10 what does x equal and how do you solve it? ---------------- Add x to both sides -4 = 10 + x Subtract 10 from both sides -14 = x x = -14
 Travel_Word_Problems/687882: victorias family drove 672 miles in 14 hours. What was the average speed for the trip. 1 solutions Answer 425382 by Alan3354(30993)   on 2012-12-01 10:21:04 (Show Source): You can put this solution on YOUR website!victorias family drove 672 miles in 14 hours. What was the average speed for the trip. ============= d = r*t r = d/t
 test/687872: Find the area of quadrilateral formed with vertices (3,-5),(5,-1),(2,1),(-3,-2)1 solutions Answer 425379 by Alan3354(30993)   on 2012-12-01 09:39:19 (Show Source): You can put this solution on YOUR website!Find the area of quadrilateral formed with vertices (3,-5),(5,-1),(2,1),(-3,-2) ------------- Label the points: A(3,-5), B(5,-1), C(2,1), D(-3,-2) ----------- .A...B...C...D...A +3 +5 +2 -3 +3 x values -5 -1 +1 -2 -5 y values ---------- Add the diagonal products starting upper left 3*-1 + 5*1 + 2*-2 + -5*-5 = -3 + 5 - 4 + 25 = 13 ---- Add the diagonal products starting lower left -5*5 + -1*2 + 1*-3 + -2*3 = -25 - 2 - 3 - 6 = -36 ---- Area = 1/2 the difference = 49/2 sq units ------- This method works for ALL polygons, any # of sides. The points have to be entered in order around the polygon, tho.
 Exponents/687867: Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers. 1/7 6/7 x . x 1 solutions Answer 425372 by Alan3354(30993)   on 2012-12-01 09:03:02 (Show Source): You can put this solution on YOUR website!positive exponents. Assume that all variables represent positive real numbers. 1/7 6/7 ============== x^(1/7)*x^(6/7) = x^(1/7+6/7) = x^1 = x
 Evaluation_Word_Problems/687859: You have 80 feet of fencing to enclose a rectangular region. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area? 1 solutions Answer 425370 by Alan3354(30993)   on 2012-12-01 09:00:50 (Show Source): You can put this solution on YOUR website!You have 80 feet of fencing to enclose a rectangular region. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area? --------------- Max area is a square, 20 by 20 Area = 400 sq ft. ----------------- Do you need proof?
 Linear-equations/687860: Please help? I am trying to understand this but have no clue what I am doing. Determine the slope of each line 5x+3y=3 15x+9y=01 solutions Answer 425363 by Alan3354(30993)   on 2012-12-01 08:20:57 (Show Source): You can put this solution on YOUR website!duplicate
 Polynomials-and-rational-expressions/687737: I need help with finding all the zeroes of an equation. x^4-6x^2-7x-6=0 1 solutions Answer 425304 by Alan3354(30993)   on 2012-11-30 20:48:30 (Show Source): You can put this solution on YOUR website!I need help with finding all the zeroes of an equation. x^4-6x^2-7x-6=0 --------------- Try the factors of 6, plus and minus.
 Linear_Algebra/687665: x+4y=16 Need to figure out to put plots on graph1 solutions Answer 425277 by Alan3354(30993)   on 2012-11-30 18:26:02 (Show Source): You can put this solution on YOUR website!x+4y=16 Need to figure out to put plots on graph ------- x = -4y + 16 Pick 2 values for y, find x. Plot the 2 points. Draw a line thru them.
 Average/687682: If you have a 100% in a class, and u get a 60% on a test, what will be my final grade.1 solutions Answer 425275 by Alan3354(30993)   on 2012-11-30 18:24:42 (Show Source): You can put this solution on YOUR website!If you have a 100% in a class, and u get a 60% on a test, what will be my final grade. ---------- Not enough info. Is the 60% test 10% of the grade? 50%? what?
 Problems-with-consecutive-odd-even-integers/687602: three good friends are in the same algebra class their scores on a recent test are three consecutive even integers whose sum is 216.find each score1 solutions Answer 425274 by Alan3354(30993)   on 2012-11-30 18:23:24 (Show Source): You can put this solution on YOUR website!three good friends are in the same algebra class their scores on a recent test are three consecutive even integers whose sum is 216.find each score ---------- 216/3 = 72, the middle score
 Rectangles/687654: An american flag has a width of 15 ft and length of 5 ft less than the width.determine amount of square feet of fabric required to make an american flag1 solutions Answer 425272 by Alan3354(30993)   on 2012-11-30 18:19:24 (Show Source): You can put this solution on YOUR website!An american flag has a width of 15 ft and length of 5 ft less than the width.determine amount of square feet of fabric required to make an american flag ------------------- Hint: 5 ft less than 15 is 10 feet.
 Sequences-and-series/687674: Solve the equation 6^x-2= 200 algebraically and check with the graph of y = 6^x-2- 200 . (Give both an exact answer and an approximation to the nearest 0.0001.) 1 solutions Answer 425271 by Alan3354(30993)   on 2012-11-30 18:18:25 (Show Source): You can put this solution on YOUR website!Solve the equation 6^x-2= 200 algebraically and check with the graph of y = 6^x-2- 200 . (Give both an exact answer and an approximation to the nearest 0.0001.) ------------- What's the exponent of 6? Is it x? or x-2?
 Graphs/687678: y=5x Square 2 1 solutions Answer 425270 by Alan3354(30993)   on 2012-11-30 18:14:26 (Show Source): You can put this solution on YOUR website!y=5x Square 2 ----------- Not sure what that means. You're looking for free help. Take the time to enter your problem in a way that makes sense. ------- Then, say what it is you want to do.
 Graphs/687681: y=2/3x squared1 solutions Answer 425269 by Alan3354(30993)   on 2012-11-30 18:12:38 (Show Source): You can put this solution on YOUR website!y=2/3x squared -------------- And? What about it?
 Equations/687680: Please factor the following: 6x-3y=27 3x-y=131 solutions Answer 425268 by Alan3354(30993)   on 2012-11-30 18:11:59 (Show Source): You can put this solution on YOUR website!Please factor the following: 6x-3y=27 --> 3*(2x-y = 9) 3x-y=13 Doesn't factor
 Linear_Algebra/687679: Find delta x and delta y for the points (-4,6) and (3,-7).1 solutions Answer 425266 by Alan3354(30993)   on 2012-11-30 18:10:49 (Show Source): You can put this solution on YOUR website!Find delta x and delta y for the points (-4,6) and (3,-7). ------- Using the points in order: dx = 7 dy = -13
 test/687604: What quadratic equation has the solution -3+2iroot2?1 solutions Answer 425261 by Alan3354(30993)   on 2012-11-30 17:12:38 (Show Source): You can put this solution on YOUR website!What quadratic equation has the solution -3+2iroot2? ----- It will also have the conjugate as a root, -3 - i*2sqrt(2) = -3 - isqrt(8) --------------
 Volume/687595: How many cubes, 1cm on each edge, would fit into a right rectangular prism 7cm by 10cm by 12cm?1 solutions Answer 425233 by Alan3354(30993)   on 2012-11-30 15:03:54 (Show Source): You can put this solution on YOUR website!How many cubes, 1cm on each edge, would fit into a right rectangular prism 7cm by 10cm by 12cm? ------------ With no lost space, it's the volume of the prism --- Vol = L*W*H
 Volume/687616: The base of a rectangular prism is 5.4 centimeters long and 4.9 centimeters wide. It is 3.8 centimeters tall. What is the volume of the prism? Round your answer to the nearest tenth.1 solutions Answer 425232 by Alan3354(30993)   on 2012-11-30 15:02:53 (Show Source): You can put this solution on YOUR website!The base of a rectangular prism is 5.4 centimeters long and 4.9 centimeters wide. It is 3.8 centimeters tall. What is the volume of the prism? Round your answer to the nearest tenth. -------- It's the product, L*W*H
 Circles/687610: If the angle of a segment of circle is 25 degrees what is its radius?1 solutions Answer 425230 by Alan3354(30993)   on 2012-11-30 14:46:52 (Show Source): You can put this solution on YOUR website!If the angle of a segment of circle is 25 degrees what is its radius? --------- It could be any radius.
 test/687532: Can you show me how to factor completely this problem 125c^6 -8d^61 solutions Answer 425225 by Alan3354(30993)   on 2012-11-30 14:19:28 (Show Source): You can put this solution on YOUR website!Can you show me how to factor completely this problem 125c^6 -8d^6 ------------- It's a difference of 2 cubes
 Travel_Word_Problems/687591: a man drives 5 km in 10 minutes,what is his speed in km per hour?1 solutions Answer 425224 by Alan3354(30993)   on 2012-11-30 14:17:17 (Show Source): You can put this solution on YOUR website!a man drives 5 km in 10 minutes,what is his speed in km per hour? ----------------- How far would he go in 30 minutes? Then double that.
 Probability-and-statistics/687601: A girl flips a coin six times. If she gets a head, tail, head, tail, and head combination the first five times, what is the probability that she will get a tail the sixth time she flips the coin? A. 0 B. (1/2)(1/2)(1/2)(1/2)(1/2)(1/2) C. 1/2 D. 1 1 solutions Answer 425221 by Alan3354(30993)   on 2012-11-30 14:04:03 (Show Source): You can put this solution on YOUR website!A girl flips a coin six times. If she gets a head, tail, head, tail, and head combination the first five times, what is the probability that she will get a tail the sixth time she flips the coin? ------------ 1/2 The history has no effect.
 test/687608: factor the trinomial c^2 -14c + 401 solutions Answer 425220 by Alan3354(30993)   on 2012-11-30 14:02:38 (Show Source): You can put this solution on YOUR website!factor the trinomial c^2 -14c + 40 -------------- Find a pair of factors of 40 that add to 14, both negative numbers.
 Geometry_Word_Problems/687582: A piece of tile is 4 1/2 inches long and 3 1/4 inches wide. What is the area of the tile? 1 solutions Answer 425219 by Alan3354(30993)   on 2012-11-30 13:29:55 (Show Source): You can put this solution on YOUR website!A piece of tile is 4 1/2 inches long and 3 1/4 inches wide. What is the area of the tile? -------------- Area = L*W
 Expressions-with-variables/687553: What is 2t+38=5(t+1)1 solutions Answer 425201 by Alan3354(30993)   on 2012-11-30 11:35:51 (Show Source): You can put this solution on YOUR website!What is 2t+38=5(t+1) ---------------- It's an equation in t.
 logarithm/687548: ln5+lnx^4=4051 solutions Answer 425195 by Alan3354(30993)   on 2012-11-30 11:28:00 (Show Source): You can put this solution on YOUR website!ln5+lnx^4=405 ---------------- ln(5x^4) = 405 x=~ 6.274423E43