Here is the question I cannot get it....
In a series of license plates, the first three symbols are any of the 26 letters in the alphabet and the last three are any of the 10 digits from 0 to 9.
How many plates can be formed in which at least one symbol is repeated?
--------I know that...
Prove that the sum of the exterior angles at opposite vertices of any quadrilateral es equal to the sum of the interior angles at the other two vertices.
THIS question is REAly really really really getting me frustrated...
The way we're suppost to do it is like this....
180n-360 is the...
Ok so can you please tell me where I go wrong here. I want to put
y=3x^2+2x-1 into y=a(x-h)^2+K
ax^2=3x^2 -----> a=3
But I think it's suppost to be: y=3(x+1/3)^2-4/3
yea i''m really struggling with this one....
I understand that if you change 10x+4y-101=0 to y=(101-10x)\4 that the direction vector for that line would be (4,-10) am I right?
then since they are perpendicular I would take the point (3,-4) and subract it to make the direction vector for...
Ok I get everything from the beginning, and I know I'm retarded I should have understood that. What is making me confused is the y=1+6t part.
that comes from the vector equation r=(6,1)+t(0,6)
Why do you even need to know the y=1+6t part? How do you check from that? I originaly thought you...
ok i don't get how you get y= (2/5)(x-3)- 4
can't you do (x-3,y+4)dot(2,5)= 0 and then substitute
can't I also write it as r=(3,-4)+t(2,5)?????
LOL i tried doing it my way and i got as an answer to be (187/14,-171/21)
I have tried but doesn't work out well....
Find the point at which the normal through the point (3,-4) to the line 10x+4y-101=0 intersects the line.
Originaly I thought that it should be found by doing the dot product of:
Ok let me show you how i think it's to be done because I don't get your part of
"That equation, together with the equations (x-11)/3=(y+8)/-1=(z-4)/1 is enough to solve for x, y, and z and then the equation of the line."
r dot r1=...
This question is really pissing me off because I don't understand it. I know how to do it but don't understand the reasoning:
Find an equation of the line through the point (4,5,5) that meets the line
(x-11)/3=(y+8)/-1=(z-4)/1 at right angles.
I found out that you have to do the dot...