Easy Pts, Dumb Questions III

[101dalmatians]

I know how to do these rate questions but just get it wrong for some reason...

Four painters can paint 3 houses in 5 days. How long will it take 3 painters to paint 5 houses?
Ans. 267 hrs

||V|| is the magnitude right?

[unparseable or potentially dangerous latex formula]
How many elemts are there if [unparseable or potentially dangerous latex formula]
I got 7 elements... -3pi to 3pi
Ans. 14
Why?

Anthony, Chuck, and Karlyn are getting ready to grade their number sense tests at the TMSCA STATE MEET. Each of them is using a pen with a color of ink. They put their pens in a bag ad randomly select a pen from the bag. What is the probability that at least one of them gets their own pen?
Ans. 2/3

Oh another type of probability (kinda making this up cuz I cant find a problem like this)
There are 6 people: A, B, C, D, E, and F. They want to sit in 6 chairs. A only wants to sit next to B. C does not want to sit next to E. How many ways can these 6 people sit in those 6 chairs?

What are orthogonal vectors?

Also, where can I find all those circle/arc theorems that can get me more questions on the math test?
other than in a geometry txt book lol?

[ohernandez]

[101dalmatians]

coOl :O
Thanks :)
Hope I can do these fast now!

[darksaber21]

[sxk1693]

[sxk1693]

Darksaber... IDK but I think you quoted wrong

[darksaber21]

[101dalmatians]

omg sorry bout that
didnt no what i was doin when i was typing the question
thanks :P btw

[darksaber21]

It's fine. Just be careful next time, alright?

[101dalmatians]

Ok so I do 54 qs and miss a stupid 9 qs and half of those mistakes are just dumb and caused by stupidity
like geometric mean of three numbers is apparently the square root of those numbers!

Anyway a few qs

Let [unparseable or potentially dangerous latex formula] represent a Lucas Number and [unparseable or potentially dangerous latex formula] represent a Fibonacci Number. Find [unparseable or potentially dangerous latex formula]
A) 26
B) 39
C) 42
D) 55
E) 68
I know what fibonacci nos and lucas numbers are but what answer choice fits?
Answer: C
Why?


stupid degenerate conics back again
I knew it was a line but can u guys tell me how to find whether it is 2 intersecting/parallel lines or only one line?

[101dalmatians]

And other stupid mistakes:

I thought 1 was an even number

Forgot to add 20 on both sides for a conic section equation

Forgot about eccentricity - completely...
nd yeah
so I coulda gotten back - wat - 48 pts and gotten a 300!
So dumb of me... :(

[darksaber21]

[qwerty123]

I wouldn't waste my time adding the series...

There are useful formulas out there for them:

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

where [unparseable or potentially dangerous latex formula] and the brackets around them indicates that you round to the nearest whole number

[101dalmatians]

well yeah

so F series: 1,1,2,3,5,8,13,...

L series: 2,1,3,4,7,11,18,...
So it only comes out to be 31 not 42
why 29?

[qwerty123]

[101dalmatians]

[qwerty123]

[qwerty123]

[qwerty123]

[101dalmatians]

Numbers dont help much
Reasoning?

[qwerty123]