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#1
+42
0
Write your equations in the form y = rx + s
Where r is saying something on the direction of the line.
The same r, so the same direction (parallel)
r1 x r2 = -1 then perpendicular
Try now!
y = 3/8 x + 14/8 r1 = 3/8
y = -32/12 x - 15/12 => y = -8/3 x - 5/4 r2 = - 8/3
r1 * r2 = ?
3/8 * -8/3 = -1
Perpendicular!
ricom39
Feb 25, 2013
#3
0
neeyokke enthonnaaadi ee parayunne?????????? ninakkokke enthinte asukhama............. neyoke padikkaaanaaano ingotu vanne?????????????
Guest
Feb 25, 2013
#2
0
Heyya.... Wat are you asking for????? i dint get......
Guest
Feb 25, 2013
#1
0
Athoke Anganaaadi koothareeee......
Guest
Feb 25, 2013
Feb 24, 2013
#1
0
tan(36) = x/42
at first, you have to find tan 36 degrees. For the best use calculator.
tan(36) = 0.726542528005
so
0.726542528005 = x / 42
now you need to get x on one side and numbers you know on the other side. The number you are removeing on other side have to change mark on its oposite. There it is / to *. It's like with + and -. ( 10 = x + 4 .... 10 - 4 = x)
0.726542528005 * 42 = x
30.51478617621 = x
Guest
Feb 24, 2013
#3
0
<b>900 to the power of 7<b/>
Guest
Feb 24, 2013
#2
0
<b>5<b/>
Guest
Feb 24, 2013
#1
0
<b>5<b/>
Guest
Feb 24, 2013
Feb 23, 2013
#4
0
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Is about the maximum number of 0's in a comment with the words.
Guest
Feb 23, 2013
Feb 22, 2013
#2
0
What I did exactly,
Guest
Feb 22, 2013
#1
0
4/9
2/5
7/20
4/10
1/3
6/9
6/9
6/9
6/9
6/9
how i got ths answr:
420
Guest
Feb 22, 2013
Feb 21, 2013
#3
0
100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...................
I should really be doing my math homework though so wont finish
Guest
Feb 21, 2013
#1
0
I found it
Guest
Feb 21, 2013
#2
0
Thank You!!!
Guest
Feb 21, 2013
#2
0
Thank you so much for your help! I really appreciate it.
Guest
Feb 21, 2013
Feb 20, 2013
#1
0
So for (1) and (2) you 1st need to find the gradient using the formular
m = (y2 - y1) / (x2 - x1) or if you prefer m = (y1 - y2) / (x1 -x2) [both formulars give same result]
Then once you get that substitute it into the formular y - y1 = m(x - x1)
(1) m = (2 - -1) / (-4 - 1)
= -(3/5)
therefore y - -1 = -(3/5) (x - 1)
y + 1 = -(3/5)x + (3/5)
y = -(3/5)x + (3/5) - 1
= - (3/5)x +3/5 - 5/5
= -(3/5)x - 2/5
(2) m = (5 - -1) / (3 - -2)
= 6/5
therefore y - - 1 = 6/5(x - - 2)
y + 1 = 6/5(x + 2)
y = (6/5)x + 12/5 - 1
= (6/5)x + 12/5 - 5/5
= (6/5)x + 7/5
For (3) you need to be aware that gradient of a line that is perpindicular to another line = -(1/m).
So the gradient of a line that is perpendicular to (Y = 2X + 3) = -(1/2).
Substituting that into the formular y - y1 = m(x - x1) gives you
y - 4 = -(1/2)(x - 3)
y = -(1/2)x + 3/2 +4
= -(1/2)x +3/2 + 8/2
= -(1/2)x + 11/2
Guest
Feb 20, 2013
#1
0
(1) You're almost right. Its actually y = 70 - 7w or you can write it as y = -7w +70
(2) & (3) seem to be right but to get full marks your teacher might want you to fully simplify
so for (2) you would go
Y - 0 = -2(X - 3)
Y = -2x + 6
& for (3)
Y - 2 = 2(X - 1)
Y - 2 = 2x - 2
Y = 2x - 2 + 2
Y = 2x
For (4) & (5) you need to be aware of 2 important facts
1stly if 2 lines are parallel then their gradients will be equal.
2ndly when an equation is written in the form y = ax + b, a always equals the gradient. In other words y = mx +b
eg y = 4x +7 has a gradient of 4
So combining this knowledge with the formular y - y1 = m(x - x1) you get these answers
(4) y - 0 = 1(x - 5)
y = x - 5
(5) y - 1 = 2( x - -4)
y - 1 = 2x + 8
y = 2x + 9
Guest
Feb 20, 2013
#1
0
Wow, I'm surprised your mommy or daddy let their toddler use the computer! Are you parents on the computer with you? Because little kids shouldn't be on the computer without Mommy or Daddy's help. The computer can be a very scary place sometimes.
Well, sweetie, the answer to your question is simple. Hold up 2 fingers, and then hold up one more. What does that make? 3?
You are a very smart 2 year old! Well done, and I hope you grow up to be a very smart young person!
Guest
Feb 20, 2013
#15
0
You should try and use PEMDAS ( parenthesis , exponents, multiplication , division , addition , and subtraction!
Guest
Feb 20, 2013
#3
0
your welcome
Guest
Feb 20, 2013
#2
0
^^^^^^
thank you so much!
Guest
Feb 20, 2013
#1
0
length of the wire = 40.0m/cos(58 degrees and 20 minutes)
to convert 20 minutes:
20/60=1/8 or 0.125 then add 58 that gives you the answer 58.125
length of the wire = 40.0/cos(58.125)
length of the wire = 75.75m
length of the antenna = square root of ( 75.75^2-40.0^2)
length of the antenna = 64.33 m
the angles:
58.125,90 and 31.875
Guest
Feb 20, 2013
Feb 18, 2013
#1
+3146
0
what's your input?
[input]cos(pi)[/input]
[inputrad]cos(pi)[/inputrad]
admin
Feb 18, 2013
Feb 17, 2013
#1
0
Nvm, i figured it out
Guest
Feb 17, 2013
#1
0
sqrt(x, 5)
x = the number you want to take the 5th root of
Guest
Feb 17, 2013
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