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Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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Square-cubic-other-roots/564808: 3square root54 1 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-18 1 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 length 1 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 bases 1 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 fast 1 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=3 1 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 b 1 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 - 4 1 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/12 1 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 π 1 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): You can put this solution on YOUR website!

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 out 1 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.