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test/719721: A cruise ship is moving N 200 E at 20 mph against a current moving 3 mph at S 300 E. What will the actual direction and magnitude be?
1 solutions
Answer 441469 by Alan3354(30993) on 2013-02-27 14:14:19 (Show Source):
You can put this solution on YOUR website!A cruise ship is moving N 200 E at 20 mph against a current moving 3 mph at S 300 E. What will the actual direction and magnitude be?
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What is N 200 E?
What is S 300 E?
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Circles/719633: find the (h,k) and radius r for the equation 4(x-5)^2+4y^2=16. What are the intercepts? 1 solutions
Answer 441438 by Alan3354(30993) on 2013-02-27 09:58:20 (Show Source):
You can put this solution on YOUR website!find the (h,k) and radius r for the equation 4(x-5)^2+4y^2=16.
(x-5)^2 + y^2 = 4
(h,k) = (5,0) the center
r^2 = 4 --> r = 2
--------
What are the intercepts?
(x-5)^2 + y^2 = 4
y=0: --> (x-5)^2 = 4
x - 5 = 2
x = 7 --> (7,0)
---
x-5 = -2
x = 4 --> (3,0)
---
x=0: --> 25 + y^2 = 4
y^2 = -21 --> no y-intercepts
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percentage/719660: If a speed increased from 4 minutes to 96 minutes, what is the percentage of increase?
1 solutions
Answer 441434 by Alan3354(30993) on 2013-02-27 09:51:16 (Show Source):
You can put this solution on YOUR website!If a speed increased from 4 minutes to 96 minutes, what is the percentage of increase?
-----------------
Minutes are not units of speed.
----
An increase from 4 to 96 is an increase of 92
92/4 = 23 --> 2300%
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Note that it's 23 times more, 24 times as much.
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Travel_Word_Problems/719654: You can ride a bike at 15 mph. Your sister rides 12 mph. You give her a one-hour head start. In how many hours will you catch up if neither of you stops.
(15 + x) (12 + x)
15x - 12x
In 2 hours 1 solutions
Answer 441428 by Alan3354(30993) on 2013-02-27 09:36:07 (Show Source):
You can put this solution on YOUR website!You can ride a bike at 15 mph. Your sister rides 12 mph. You give her a one-hour head start. In how many hours will you catch up if neither of you stops.
(15 + x) (12 + x)
15x - 12x
In 2 hours
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In 1 hour, she's 12 miles away (12*1)
You "gain on her" at 3 mi/hr (15-12)
---
t = d/r = 12/3 = 4 hours
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Pythagorean-theorem/719640: a right triangle has one leg of 29 length and one leg of 12 length, what is the angle measure of the angle farthest from the right angle? 1 solutions
Answer 441425 by Alan3354(30993) on 2013-02-27 09:33:43 (Show Source):
You can put this solution on YOUR website!a right triangle has one leg of 29 length and one leg of 12 length, what is the angle measure of the angle farthest from the right angle?
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The right angle is C, the others are A & B
----
A = atan(12/29) =~ 22.479 degs
B = 90 - A =~ 67.52 degs
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Linear-equations/719614: Determine whether the lines through the given pairs of points are parallel. A (2, - 3), B (- 2, - 11) and C (1, 2), D (- 1, 6) 1 solutions
Answer 441424 by Alan3354(30993) on 2013-02-27 09:28:38 (Show Source):
You can put this solution on YOUR website!Determine whether the lines through the given pairs of points are parallel. A (2, - 3), B (- 2, - 11) and C (1, 2), D (- 1, 6)
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Find the slopes. If, and only if, the slopes are equal, they're parallel.
---
For AB: A (2,- 3), B (- 2,- 11)
slope m = diffy/diffx
m = -8/(-4) = 2
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Find the slope of CD, compare them.
===============
PS Don't put a space after the comma in the points.
(1,2) not (1, 2)
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Graphs/719422: how can you solve,
(-6)^2+4(-6)=5 1 solutions
Answer 441344 by Alan3354(30993) on 2013-02-26 20:11:13 (Show Source):
You can put this solution on YOUR website!how can you solve,
(-6)^2+4(-6)=5
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Since there's no variable, there's nothing to solve.
===========
(-6)^2+4(-6)=5
36 - 24 = 5
12 = 5 not a true statement.
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Did you leave something out?
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Travel_Word_Problems/719424: I need help with math expressions.
if a bus leaves a station that is 357 miles from Chicago and travels toward Chicago at a rate of 50 mph?
Thank you :) 1 solutions
Answer 441343 by Alan3354(30993) on 2013-02-26 20:09:00 (Show Source):
You can put this solution on YOUR website!if a bus leaves a station that is 357 miles from Chicago and travels toward Chicago at a rate of 50 mph?
-------------
You didn't ask a question.
What do you want to know?
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pythagorean/719434: i need help with a question that said find the missing side if a= 81 b=? and c=225. I squared it out and moved the square of 81 which is 6561 over to the square of 225 which is 50625 and added it and got 57186. I used the square root key and got 239.14 and got it wrong. I need help please round to the nearest percent. 1 solutions
Answer 441342 by Alan3354(30993) on 2013-02-26 20:07:03 (Show Source):
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logarithm/719389: I need to figure out how to write an expression as a single logarithm  1 solutions
Answer 441333 by Alan3354(30993) on 2013-02-26 18:51:23 (Show Source):
You can put this solution on YOUR website!I need to figure out how to write an expression as a single logarithm 
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They're all the same base.
When the logs are added --> multiplied.
When the logs are subtracted --> divided.
------
That's how you do it.
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Complex_Numbers/719099: plz solve this problem for me_
Show that the points 3+2i,2-i,1+i,4+i lies on a circle. Find its center and radius. 1 solutions
Answer 441211 by Alan3354(30993) on 2013-02-26 11:17:43 (Show Source):
You can put this solution on YOUR website!Show that the points 3+2i,2-i,1+i,4+i lies on a circle. Find its center and radius.
================
Plot the points on the x-y plane, A(3,2), B(2,-1), C(1,1) & D(4,1)
Check that no 3 of the points are colinear by finding the slopes of
DA, AB, BC & CD (going in order of xes)
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Any 3 non-colinear points define a circle.
Get the equations of the perpendicular bisectors of 2 lines, AB & BC will do.
The intersection of the bisectors is the center of the circle.
The distance from the center to any of the A, B or C is the radius.
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Check that point D is on the circle.
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Polygons/719107: a regular polygon has 14 sides. what is the measure of each vertex?
1 solutions
Answer 441203 by Alan3354(30993) on 2013-02-26 09:19:40 (Show Source):
You can put this solution on YOUR website!a regular polygon has 14 sides. what is the measure of each vertex?
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The sum of external angles is always 360 degs
Each ext angle = 360/14 = 180/7 degs
Internal angles = 180 - 180/7 = 1080/7 degs
=~ 154.286 degs
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Exponents/718900: HIIIIIIIIIIA!!!!
okso br0 i need help on math ye kno m8
kso the question is:
WHATS THE ANSWER FOR: s to the power of 3 ova (/) t to the power of 5
broo like help cuz im in deep truble if i dnt do this ye kno br0 kso explain it well my man u nigga ass math wizrds need 2 help ur bro in the hood ye kno
btw i aint doing this for the lulzzzz i need legt halp on math thnx!!!! i luv u if u help a nigga in da need ye kno br0 this aint for the lulz dnt worry jst rply thnx!!!!!!!!!
#swag #iNeedHelp
i'd really appreciate yur help m8 thnx gd night 1 solutions
Answer 441126 by Alan3354(30993) on 2013-02-25 20:25:42 (Show Source):
You can put this solution on YOUR website!WHATS THE ANSWER FOR: s to the power of 3 ova (/) t to the power of 5
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= 
That's all you can do with that.
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Unless you mean
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