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Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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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 you 1 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=0 1 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 graph 1 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 score 1 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 flag 1 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 squared 1 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=13 1 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^6 1 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 + 40 1 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=405 1 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