how big a change is yr 11 maths to yr 10 maths (1 Viewer)

[SpiralFlex]

Ship A is sailing due north at 24 km/h and ship B is sailing due west at 16 km/h. At 2 pm, B is 104 km due east of A. When will they be nearest and by how near?

 

[big_bang344]

LOL. Nope, i go to a different school. But very connected

 

[SpiralFlex]

Humans are their social lives...

 

[jamesfirst]

I like turtles.

 

[powlmao]

Ship A is sailing due north at 24 km/h and ship B is sailing due west at 16 km/h. At 2 pm, B is 104 km due east of A. When will they be nearest and by how near?

I know how to answer that, (through a x & y graph ) but can't get the equations

 

[cutemouse]

Standard 2U question:

Solve for x: |x - 1| = -5

 

[powlmao]

[x-1]= -5

Breaks into 2 equations

x-1=-5
x=-4

and

x-1=-[-5]
x-1=5
x=6

Therefore x= 6 and -4

 

[Aesytic]

Standard 2U question:

Solve for x: |x - 1| = -5

no answer because absolute values are never < 0

 

[The Derivative]

no answer because absolute values are never < 0

What on earth are you talking about? There is an answer.

x-1= -5
x= -4

x-1= 5
x= 6

Absolute values= +/-

 

[powlmao]

no answer because absolute values are never < 0

[x-1]= -5

Breaks into 2 equations

x-1=-5
x=-4

and

x-1=-[-5]
x-1=5
x=6

Therefore x= 6 and -4

Above is how you do it, it is an Equation

 

[SpiralFlex]

No solutions.

 

[The Derivative]

lawl

wait
there is no answer


MY BAD

 

[SpiralFlex]

There is a solution

On Mars there would be. But here on earth,



It is not possible for that sole absolute value in that bracket to be negative.



Whatever is in the absolute brackets is always a positive. It cannot be a negative unless another operation occurs. Hence there are no solutions.

I know how to answer that, (through a x & y graph ) but can't get the equations

Nope.

 

[The Derivative]

On Mars there would be. But here on earth,



It is not possible for that sole absolute value in that bracket to be negative.



Whatever is in the bracket it's always positive. It cannot be a negative unless another operation occurs. Hence there are no solutions.

lawl

wait
there is no answer


MY BAD

I actually thought about it after that post
Gawd I suck at math

 

[SpiralFlex]

I actually thought about it after that post
Gawd I suck at math

Humans...

 

[powlmao]

It is way to early for maths, i have been waking up at ~11am everyday in the holidays and i am trying to get my sleeping back in whack.

Yes, my bad, there is no answer

If it wasn't negetive

[x-1]= 5

x-1=5
x=6

and

x-1=-5
x=-4

Therefore [x-1]= 5, x is -4 and 6

 

[SpiralFlex]

It is way to early for maths, i have been waking up at ~11am everyday in the holidays and i am trying to get my sleeping back in whack.

Yes, my bad, there is no answer

If it wasn't negetive

[x-1]= 5

x-1=5
x=6

and

x-1=-5
x=-4

Therefore [x-1]= 5, x is -4 and 6

It's never too early for the art of mathematics.

 

[The Derivative]

Humans...

I know...

Hopefully I wont make such a noob mistake in an exam. Also! I've learnt Permutations and Combinations. So now i'll try to discover your name

 

[SpiralFlex]

I know...

Hopefully I wont make such a noob mistake in an exam. Also! I've learnt Permutations and Combinations. So now i'll try to discover your name

It is way to early for maths, i have been waking up at ~11am everyday in the holidays and i am trying to get my sleeping back in whack.

Yes, my bad, there is no answer

If it wasn't negetive

[x-1]= 5

x-1=5
x=6

and

x-1=-5
x=-4

Therefore [x-1]= 5, x is -4 and 6

I just saved you a potential 1 marker for question 1 in your HSC.

 

[powlmao]

I know, never too early.

I <3 Maths!