# SC mathematics Marathon (1 Viewer)

Vertex
x intercepts
Y intercepts
concave

Y=x^2+3x+8

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#### bleakarcher

##### Active Member
lol, i have realised. you have to appreciate these simple though as they build for the much more complex

#### RivalryofTroll

##### Sleep Deprived Entity
Why would we do a marathon on SC Mathematics when most of us would be worried for Science, History or Geography!

#### dionb2014

##### Member
I'm most worried about the non-calculator section to be honest. Rivalryoftroll, I am lucky enough to not be sitting science, history or geography until next year, Oh wait, this is the last year school certificate is taking pace.

#### nazfiz

##### Member
Two cars are travelling towards each other at 60km/h and 80km/h.
How far apart are they 15 minutes before they pass each other?

#### zombies

##### Member
Two cars are travelling towards each other at 60km/h and 80km/h.
How far apart are they 15 minutes before they pass each other?
well 15min = 1/4 of hour so:

1/4 of 60 = 15
1/4 of 80 = 20

20 + 15 = 35

therefore 35km

#### twinklegal19

##### .
Two cars are travelling towards each other at 60km/h and 80km/h.
How far apart are they 15 minutes before they pass each other?
Car 1: 60km/h x 0.25 = 15km
Car 2: 80km/h x 0.25 = 20km
Distance = 15+20
= 35 km apart

#### 3PiCFail

##### Member
sum of angles in a 92-side a gon?

#### bleakarcher

##### Active Member
Two cars are travelling towards each other at 60km/h and 80km/h.
How far apart are they 15 minutes before they pass each other?
The question makes no sense.

#### twinklegal19

##### .
The question makes no sense.
Probably replace the end with "before they crash into each other" assuming they are travelling in a straight line?

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#### nazfiz

##### Member
The question makes no sense.
LOL, it's from the 2008 SC, that shows how smart the SC question writers are.

#### bleakarcher

##### Active Member
u need the initial distance between the cars and the fact they began driving towards each other simultaneously

#### zombies

##### Member
u need the initial distance between the cars and the fact they began driving towards each other simultaneously
You don't really.. you just know that they're gonna pass eachother in 15mins so you work backwards from that.

#### fatima96

##### Member
Plant A has a height of 120 cm. Plant B has a height of 100 cm. Plant A grows 3 cm per day. Plant B grows 5 cm per day. How tall will thy be when at the same height?

#### lath

##### Member
Plant A has a height of 120 cm. Plant B has a height of 100 cm. Plant A grows 3 cm per day. Plant B grows 5 cm per day. How tall will thy be when at the same height?
150cm

#### zombies

##### Member
15 balls with the numbers 1 to 15 written on them are placed into a box. What is the possibility of pulling out a prime number?

#### lath

##### Member
15 balls with the numbers 1 to 15 written on them are placed into a box. What is the possibility of pulling out a prime number?
2/5 ?

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#### lil_pembo

##### Member
you do realise this is the school certificate, right?
It counts for so much that they are cutting it out next year.

#### megabakedpotato

##### Member
I hope you all realise that the School Certificate is the most pointless part of your schooling and means shit all in the long run... Maybe go outside and get some fresh air before you start your hsc in a year or so?