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# Recent problems solved by 'Alan3354'

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 Miscellaneous_Word_Problems/478925: Evaluate t^3 when t=31 solutions Answer 328174 by Alan3354(31487)   on 2011-08-07 17:35:28 (Show Source): You can put this solution on YOUR website!It's 3^3
 Miscellaneous_Word_Problems/478926: Factor by check by multiplying x^5+7x^4=1 solutions Answer 328171 by Alan3354(31487)   on 2011-08-07 17:34:50 (Show Source):
 percentage/478951: What is 68% of 118 tons1 solutions Answer 328170 by Alan3354(31487)   on 2011-08-07 17:32:53 (Show Source): You can put this solution on YOUR website!118*0.68 tons
 percentage/478954: 140Ft is 97 % of what 1 solutions Answer 328169 by Alan3354(31487)   on 2011-08-07 17:32:13 (Show Source): You can put this solution on YOUR website!what*0.97 = 140 ft what = 140/0.97 what =~ 144.33 ft
 test/478936: What do x in ^ mean 1 solutions Answer 328160 by Alan3354(31487)   on 2011-08-07 17:00:45 (Show Source): You can put this solution on YOUR website!It's used to denote exponents x^2 = x squared = x*x, x times x * is used for multiply, if that's your next question
 Circles/478890: if the radius of a wheel is f feet, how many revolutions does the wheel make per mile? (1 mile = 5,280feet)1 solutions Answer 328158 by Alan3354(31487)   on 2011-08-07 16:59:28 (Show Source): You can put this solution on YOUR website!if the radius of a wheel is f feet, how many revolutions does the wheel make per mile? (1 mile = 5,280feet) ---------------- It moves the length of its circumference each revolution C = 2pi*r = 2pi*f revs = 5280/(2pi*f) revs = 2640/(pi*f)
 Rational-functions/478849: I need help with the following problem: What function translates f(x)=xsquared down 7 units?1 solutions Answer 328106 by Alan3354(31487)   on 2011-08-07 13:30:48 (Show Source): You can put this solution on YOUR website!f(x) = x^2 - 7
 Equations/478852: I really don't understand this and need help please. The point (46, 0) lies on the line 2x + 10y = 92. Determine if this point is a solution of the system 2x + 10y = 92 -6x – 2y = -24 1 solutions Answer 328105 by Alan3354(31487)   on 2011-08-07 13:27:55 (Show Source): You can put this solution on YOUR website!The point (46, 0) lies on the line 2x + 10y = 92. Determine if this point is a solution of the system ------------------------ Sub 46 for x and 0 for y 2x + 10y = 92 2*46 + 0 = 92 as it says -------------------- -6x – 2y = -24 -6*46 - 0 <> -24 it's not on that line, not a solution to the system ------------------ If you graph it, you get 2 straight lines. The given point is on one of the line, but not the other. The solution of the system is the point that's on both lines, where they intersect. That's the point (1,9)
 Trigonometry-basics/478827: Factor sin8Θ + 2sin4Θcos4Θ + cos8Θ? Verify (cos2Θ + sin2Θ)/(cosΘ) = secΘ?1 solutions Answer 328104 by Alan3354(31487)   on 2011-08-07 13:22:10 (Show Source): You can put this solution on YOUR website!If those are exponents: Sub x for sine and y for cosine: Can you do it now? ------------------ (cos^2 + sin^2)/cos = sec 1/cos = sec I'm convinced.
 test/478784: It takes five men one hundred and twenty days to bild a shed, how many days does t take three men?1 solutions Answer 328103 by Alan3354(31487)   on 2011-08-07 13:19:08 (Show Source): You can put this solution on YOUR website!It takes five men one hundred and twenty days to bild a shed, how many days does t take three men? ----------------- The job takes 5*120 man-days = 600 man-days 600 man-days/3 men = 200 days
 Polynomials-and-rational-expressions/478838: simplify by removing factors of 1 6r^11/18r^121 solutions Answer 328102 by Alan3354(31487)   on 2011-08-07 13:11:15 (Show Source): You can put this solution on YOUR website! -------------------- Both 6 & 18 are even numbers, so you can divide by 2/2. Both NUM and DEN have factors of r, cancel some. email if you need help, show your efforts. Tutoring is not doing it for you.
 Equations/478844: What is the LCM of 35x^2 and 175x^9.1 solutions Answer 328101 by Alan3354(31487)   on 2011-08-07 13:09:35 (Show Source):
 Probability-and-statistics/478832: how many out comes are there when you toss a coin and pick a card from a deck of 521 solutions Answer 328099 by Alan3354(31487)   on 2011-08-07 13:07:49 (Show Source): You can put this solution on YOUR website!The POSSIBLE outcomes are: 1 of 2 times 1 of 52 = 104 If you do it, there's 1 outcome.
 Equations/478825: How to Simplify 5.888888888888891 solutions Answer 328097 by Alan3354(31487)   on 2011-08-07 12:51:51 (Show Source): You can put this solution on YOUR website!"simplify" is not clear. ---------------- If it's a repeating 8, and you want the fraction: n = 0.88888... 10n = 8.8888888... 1n = 0.8888888... -------------------- Subtract 9n = 8 n = 8/9 --------- --> 5 8/9
 Travel_Word_Problems/478740: A car used 7 gallons of gasoline to go a distance of 210 miles. At that rate, how much gasoline would the car use to go 495 miles?1 solutions Answer 328096 by Alan3354(31487)   on 2011-08-07 12:47:52 (Show Source): You can put this solution on YOUR website!210/7 = 30 mph 495/30 = 16.5 gallons ----------- or 210:7::495:x 210x = 7*495 x = 7*495/210 = 16.5 gallons ----------- The other tutor made a typo, did 120 miles, but that'll be useful if you plan a 120 mile trip sometime.
 Linear-systems/478842: A car and a plane travel 50 miles and 180 miles during the same time. The difference between their speeds is 143 miles per hour. Find the speed of the airplane.1 solutions Answer 328094 by Alan3354(31487)   on 2011-08-07 12:42:35 (Show Source): You can put this solution on YOUR website!d = rt 50 = rt 180 = (r+143)t ----------- 180 = rt + 143t 180 = 50 + 143t t = 130/143 = 10/11 hours r = d/t ------- Car: 50/(10/11) = 55 mph Plane: 180/(10/11) = 198 mph
 Linear-equations/478839: sally can paint a room in 4 hours while it takes steve 7 hours to paint the same room. how long would it take them to paint the room if they worked together? 1 solutions Answer 328093 by Alan3354(31487)   on 2011-08-07 12:39:50 (Show Source): You can put this solution on YOUR website!This is a parallel input problem, commonly seen in pumps and flow rates and electrical resistances. -------------------- Hint: Consider what part of a room Sally paints per hour, and what part Steve does per hour.
 Quadratic_Equations/478790: The vertex is(3,4),and the parabola opens upward.Determine the number of x-intercepts.1 solutions Answer 328077 by Alan3354(31487)   on 2011-08-07 11:58:51 (Show Source): You can put this solution on YOUR website!Zero
 Angles/478732: How many cubic centimeters can a cigar box hold if its dimensions are 3 centimeters by 15 centimeters by 11 centimeters? Include correct units with your solution.1 solutions Answer 328076 by Alan3354(31487)   on 2011-08-07 11:57:39 (Show Source): You can put this solution on YOUR website!It's the product of the 3 dimensions, in cubic cm
 Volume/478822: when the volume (cubic inches)is known, how can you determine the circumference of a sphere?1 solutions Answer 328075 by Alan3354(31487)   on 2011-08-07 11:54:41 (Show Source): You can put this solution on YOUR website!Solve for r, then find the circumference. ------------ Circumference (on the great circle) = 2*pi*r
 Polynomials-and-rational-expressions/478817: I can not figure out how to get rid of my denominator...do i multiply by the reciprocal or square root or something else...I am struggling to even begin. I sub in (1) for all X-values correct? Find the value of the function: f(1) when f(x)=(x^2-5)/ (x+3) Please show how this is done. Thanks! 1 solutions Answer 328073 by Alan3354(31487)   on 2011-08-07 11:49:48 (Show Source): You can put this solution on YOUR website!f(1) when f(x)=(x^2-5)/ (x+3) ----------- Sub 1 for x f(1) = (1-5)/(1+3) = -4/4 = -1
 Linear_Equations_And_Systems_Word_Problems/478703: Simplify. y – 11 – 8y + 21 solutions Answer 327985 by Alan3354(31487)   on 2011-08-06 23:29:08 (Show Source): You can put this solution on YOUR website!= -7y -9
 Linear-systems/478636: Add two matrices: [ 3 4 6 5]+ [-1 3 -2 4]1 solutions Answer 327982 by Alan3354(31487)   on 2011-08-06 23:08:02 (Show Source): You can put this solution on YOUR website![ 3 4 6 5]+ [-1 3 -2 4] --------- |2 7| |4 9|
 Travel_Word_Problems/478686: the distance s traveled by a car in the time t at 6o kph.1 solutions Answer 327981 by Alan3354(31487)   on 2011-08-06 23:05:22 (Show Source): You can put this solution on YOUR website!s = 60t ----------------- s in km, t in hours
 test/478659: How do I find absolute value of the number -15.1 solutions Answer 327969 by Alan3354(31487)   on 2011-08-06 21:00:37 (Show Source): You can put this solution on YOUR website!It's the magnitude, the distance from zero. = 15
 expressions/478653: 8(xy) ihelp learning how to do algebra. im taking college courses and never took this before.1 solutions Answer 327966 by Alan3354(31487)   on 2011-08-06 20:44:34 (Show Source): You can put this solution on YOUR website!What is your question?
 Square-cubic-other-roots/478645: sqrt5y+1=61 solutions Answer 327962 by Alan3354(31487)   on 2011-08-06 19:20:22 (Show Source): You can put this solution on YOUR website!sqrt5y+1=6 5y = 25 y = 5
 Linear-equations/478554: Part 1: Write the equation of the line that passes through the points (3, 4) and (–3, –8) in point-slope form. Part 2: Using complete sentences, explain whether or not it matters which point is used in the final answer. Also explain why you chose the point you did. 1 solutions Answer 327959 by Alan3354(31487)   on 2011-08-06 19:16:36 (Show Source): You can put this solution on YOUR website!Part 1: Write the equation of the line that passes through the points (3, 4) and (–3, –8) in point-slope form. |+x +y +1| |+3 +4 +1| = 0 |-3 -8 +1| ---------------- x*(4+8) - y*(3+3) + (-24+12) = 0 12x - 6y = 12 2x - y = 2 y = 2x - 2 -------------- Part 2: Using complete sentences, explain whether or not it matters which point is used in the final answer. Also explain why you chose the point you did. What point? I used both.
 test/478611: Which is te best description of parallel lines? A.) lie within the same plane and never intersect B.) do not lie within the same plane and never intersect C.) have a single point common D.) form an acute angle 1 solutions Answer 327955 by Alan3354(31487)   on 2011-08-06 19:05:52 (Show Source): You can put this solution on YOUR website!They never intersect. They share (and define) one common plane. They both are lines in an infinite # of planes, only one of which is common. ---------- A and B are both sort of true = true but poorly stated at best.
 Permutations/478637: How many different combinations of two people can you have with two people1 solutions Answer 327951 by Alan3354(31487)   on 2011-08-06 19:00:35 (Show Source):
 test/478595: What set of side lengths does not form a right triangle? A.) 11 mm, 24 mm, 26 mm B.) 10 mm, 24 mm, 26 mm C.) 20 mm, 48 mm, 52 mm D.) 5 mm, 12 mm, 13 mm1 solutions Answer 327910 by Alan3354(31487)   on 2011-08-06 15:14:11 (Show Source): You can put this solution on YOUR website!Hint: D is a right triangle -------------- Multiply D's dimensions by 2, and by 4. -------------- If it's a right triangle, then where c is the longest side.