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# Recent problems solved by 'Alan3354'

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 Square-cubic-other-roots/564808: 3square root541 solutions Answer 365503 by Alan3354(30993)   on 2012-01-30 09:50:47 (Show Source): You can put this solution on YOUR website!3square root54 ----------
 Travel_Word_Problems/564819: A gas station is 15 miles away. How far is the gas station in kilometers? I need to use the following conversion: 1 mile is 1.6 kilometers.1 solutions Answer 365502 by Alan3354(30993)   on 2012-01-30 09:49:03 (Show Source): You can put this solution on YOUR website!d = 15 miles = 15 mi * 1.6 km/mi Notice how the miles cancel, leaving the distance in km.
 Trigonometry-basics/564644: x^2-3x-181 solutions Answer 365433 by Alan3354(30993)   on 2012-01-29 22:34:52 (Show Source): You can put this solution on YOUR website!Do you have a question?
 Polygons/564681: how many regular polygons have an interior angle that measures between 100 and 149 degrees?1 solutions Answer 365431 by Alan3354(30993)   on 2012-01-29 22:33:46 (Show Source): You can put this solution on YOUR website!how many regular polygons have an interior angle that measures between 100 and 149 degrees? ---------- The exterior angles are between 31 and 80 degrees. # of sides = 360/ext angle 360/32.7272 = 11 sides 360/36 = 10 sides 360/40 = 9 sides 360/45 = 8 sides 360/51.42 = 7 sides 360/60 = 6 sides 360/72 = 5 sides ----------- 7 polygons
 Numbers_Word_Problems/564686: The difference of the squares of two consecutive negative integers is 9. Find the integers. 1 solutions Answer 365428 by Alan3354(30993)   on 2012-01-29 22:28:58 (Show Source): You can put this solution on YOUR website!-5 & -4
 Rectangles/564687: if an official flag has a length of 2 1/2 feet find its length1 solutions Answer 365427 by Alan3354(30993)   on 2012-01-29 22:28:23 (Show Source): You can put this solution on YOUR website!if an official flag has a length of 2 1/2 feet find its length ------------- 2.5 feet
 logarithm/564552: SOLVE. Log4(log3(log2 x))=0 the 4, 3, and 2 are bases1 solutions Answer 365390 by Alan3354(30993)   on 2012-01-29 19:58:20 (Show Source): You can put this solution on YOUR website!Log4(log3(log2 x))=0 --------------- x = 8
 Points-lines-and-rays/564579: If two planes are perpendicular to the same line, are the two planes parallel?1 solutions Answer 365389 by Alan3354(30993)   on 2012-01-29 19:49:53 (Show Source): You can put this solution on YOUR website!If two planes are perpendicular to the same line, are the two planes parallel? ----- If they're perpendicular, not necessarily. Any line that intersects a plane can be perpendicular. Perpendicular is a 2-space term. -------------------------- If they're normal, then they are parallel (or coincident).
 Rate-of-work-word-problems/564582: I need to find out the formula to find out how many minutes it would take to mow an area of grass at the rate of 3 square feet per second? Thanks I have to have it in tonight to put in as computer code. Thanks again.1 solutions Answer 365388 by Alan3354(30993)   on 2012-01-29 19:47:27 (Show Source): You can put this solution on YOUR website!I need to find out the formula to find out how many minutes it would take to mow an area of grass at the rate of 3 square feet per second? Thanks I have to have it in tonight to put in as computer code. ------------------- t = area/3 (area in sq ft, time in seconds)
 test/564584: I need help fast1 solutions Answer 365387 by Alan3354(30993)   on 2012-01-29 19:45:41 (Show Source): You can put this solution on YOUR website!how fast?
 Travel_Word_Problems/564550: What was the average speed in km/h of a car that travels 50 km in 29 minutes?1 solutions Answer 365385 by Alan3354(30993)   on 2012-01-29 19:09:21 (Show Source): You can put this solution on YOUR website!What was the average speed in km/h of a car that travels 50 km in 29 minutes? ----- d = r*t r = dt = 50/29 km/minute
 Unit_Conversion_Word_Problems/564548: Question: The top of a desk has length 30 inches and width 24 inches. a) Convert dimensions into centimetres b) Imagine you want to draw a floor plan of the classroom with scale 1:50. What will the dimesions of the desk be on the floor plan, in centimetres? Answer: a) 76.2 cm by 61 cm b) ?1 solutions Answer 365384 by Alan3354(30993)   on 2012-01-29 19:08:32 (Show Source): You can put this solution on YOUR website!The top of a desk has length 30 inches and width 24 inches. a) Convert dimensions into centimetres b) Imagine you want to draw a floor plan of the classroom with scale 1:50. What will the dimesions of the desk be on the floor plan, in centimetres? Answer: a) 76.2 cm by 61 cm That's correct, 24 in = 60.96 cm ------------------ b) ? Makes no sense, insufficient data.
 logarithm/564400: solve the equations by finding the exact solution ¼x-3=31 solutions Answer 365351 by Alan3354(30993)   on 2012-01-29 16:00:17 (Show Source): You can put this solution on YOUR website!solve the equations by finding the exact solution ¼x-3=3 ---------- Add 3 to both sides. Multiply both sides by 4.
 Quadratic_Equations/564417: 1 solutions Answer 365349 by Alan3354(30993)   on 2012-01-29 15:59:24 (Show Source): You can put this solution on YOUR website!``f(x)+3x^2-18x+2 I need to graph this but don't know how Help! I'm lost''. Could you please draw a picture of what it will look like? ------------- ``f(x)+3x^2-18x+2 What are the leading `` ? ``f(x)+3x^2-18x+2 has no equal sign.
 Evaluation_Word_Problems/564412: suppose a ball is thrown vertically up in the air so that the height of the ball after t seconds is s(t)=80t-16t^2. What is the height of the ball after 1 second?1 solutions Answer 365348 by Alan3354(30993)   on 2012-01-29 15:54:36 (Show Source): You can put this solution on YOUR website!suppose a ball is thrown vertically up in the air so that the height of the ball after t seconds is s(t)=80t-16t^2. What is the height of the ball after 1 second? ------------ s(t)=80t-16t^2 Sub 1 for t
 Equations/564357: what is the real part of i to the 43rd? 1 solutions Answer 365333 by Alan3354(30993)   on 2012-01-29 14:55:29 (Show Source): You can put this solution on YOUR website!what is the real part of i to the 43rd? Real part = 0
 Coordinate-system/564360: What is the vertical intercept of the line P = 3 - (1/6)Q?1 solutions Answer 365332 by Alan3354(30993)   on 2012-01-29 14:54:32 (Show Source): You can put this solution on YOUR website!What is the vertical intercept of the line P = 3 - (1/6)Q? ---------- Which axis is vertical? What if you rotate the paper, then the other one is vertical.
 Linear-systems/564320: how do you do this equation by elimination? y=3x+17 y=-2x-8 1 solutions Answer 365327 by Alan3354(30993)   on 2012-01-29 14:25:43 (Show Source): You can put this solution on YOUR website!how do you do this equation by elimination? y= 3x+17 y=-2x-8 -------- subtract
 Functions/564336: How to Solve: a^3-b^3=(a-b)(a^2+ab+b^2)1 solutions Answer 365325 by Alan3354(30993)   on 2012-01-29 14:14:57 (Show Source): You can put this solution on YOUR website!How to Solve: a^3-b^3=(a-b)(a^2+ab+b^2) ---------- Solve for what?
 Linear-equations/564339: I need help solving the linear system 5x+y=12 -4x-2y+0.1 solutions Answer 365324 by Alan3354(30993)   on 2012-01-29 14:14:15 (Show Source): You can put this solution on YOUR website!5x+y=12 -4x-2y+0. ----- -4x-2y+0 has no equal sign
 Quadratic_Equations/564338: the length of a retangle is twice the width.the area is 200yd^2??? Can someone help me please!!!!!find the lenght and width 1 solutions Answer 365323 by Alan3354(30993)   on 2012-01-29 14:13:25 (Show Source): You can put this solution on YOUR website!10 by 20
 Expressions-with-variables/564290: Translate to an algebraic expression 16 increased by b1 solutions Answer 365309 by Alan3354(30993)   on 2012-01-29 12:41:09 (Show Source): You can put this solution on YOUR website!Translate to an algebraic expression 16 increased by b --- 16 + b
 Miscellaneous_Word_Problems/564123: A class is making an 5 liter acid solution. This 40% solution is obtained by mixing a 20% solution and a 60% solution. How much of each do you use?1 solutions Answer 365234 by Alan3354(30993)   on 2012-01-28 21:43:35 (Show Source): You can put this solution on YOUR website!A class is making an 5 liter acid solution. This 40% solution is obtained by mixing a 20% solution and a 60% solution. How much of each do you use? ------------- 40 is the average of 20 and 60, so it's equal amounts.
 logarithm/563994: How would I solve the following logarithm? 2^x + 1 = 3^x - 41 solutions Answer 365186 by Alan3354(30993)   on 2012-01-28 17:43:17 (Show Source): You can put this solution on YOUR website!How would I solve the following logarithm? 2^x + 1 = 3^x - 4 ------------- What logarithm? ------------------ 2^x + 1 = 3^x - 4 --------- What are the exponents? Is it or ??
 test/564005: I need to find out where the equations x + 2y=1and -2x+ y=-4 intersect. I have tried and my lines are not connecting!! 1 solutions Answer 365183 by Alan3354(30993)   on 2012-01-28 17:38:34 (Show Source): You can put this solution on YOUR website!I need to find out where the equations x + 2y=1 and -2x+ y=-4 intersect. I have tried and my lines are not connecting!! --------------------- x + 2y=1 -2x+ y=-4 ------- 2x + 4y = 2 (1st eqn times 2) -2x+ y = -4 ---------------- Add 5y = -2 y = -2/5 --------------- x + 2y = 1 x + (-4/5) = 1 x = 9/5 -------------- they intersect at the point (9/5,-2/5)
 Equations/563975: Good Saturday Afternoon - can you help me solve this problem. I have several problems like this to finish for school and just do not understand :( Thank You - Jenni 5/4 - 5/9 = x/121 solutions Answer 365180 by Alan3354(30993)   on 2012-01-28 17:30:56 (Show Source): You can put this solution on YOUR website!5/4 - 5/9 = x/12 --------------- Step 1 is eliminate fractions. Multiply thru by a common denominator. 4*9*12 = 432 5/4 - 5/9 = x/12 times 432 --> 5*108 - 5*48 = x*36 540 - 240 = 36x 36x = 300 x = 300/36 = 25/3 x = 25/3
 Volume/563940: Find the volume of a sphere with a 6-foot diameter. Use 3.14 for π1 solutions Answer 365154 by Alan3354(30993)   on 2012-01-28 12:20:20 (Show Source): You can put this solution on YOUR website!r = 3 ft
 Geometry_Word_Problems/563898: 1 solutions Answer 365142 by Alan3354(30993)   on 2012-01-28 10:39:21 (Show Source):
 Travel_Word_Problems/563882: given (124kph), how fast is the car moving to the nearest 10kph 1 solutions Answer 365130 by Alan3354(30993)   on 2012-01-28 08:34:03 (Show Source): You can put this solution on YOUR website!given (124kph), how fast is the car moving to the nearest 10kph ================ To the nearest 10, it's 120 km/hr
 Linear_Algebra/563828: The thrust of an airplane's engines produces a speed of 371 mph in still air. The wind velocity is given by (21,-35). In what direction should the airplane head to fly due south? Give your answer as an angle from due south rounded to three significant digits. 1 solutions Answer 365129 by Alan3354(30993)   on 2012-01-28 08:31:48 (Show Source): You can put this solution on YOUR website!The thrust of an airplane's engines produces a speed of 371 mph in still air. The wind velocity is given by (21,-35). In what direction should the airplane head to fly due south? ---------------------- Plot the point (21,-35) for the windspeed, label it A Its length is sqrt(1666) =~ 40.81666 Its angle wrt the y-axis is arctan(21/35) =~ 30.964 degs ----------------- Draw a line from A of length 371 (the plane's airspeed) from A southwest intersecting the y-axis. ------ Use the Sine Law to find angle OBA ============================= Your email didn't work.
 Trigonometry-basics/563875: how do you do the work out1 solutions Answer 365127 by Alan3354(30993)   on 2012-01-28 08:10:39 (Show Source): You can put this solution on YOUR website!I rollerblade.