sat 1

[Anum96]

...

 

[Dark Destination]

View attachment 58791
...

Just a guess in 5 seconds, without even working. E

 

[Dark Destination]

Figure out the vertex of parabola which is (1,2)
Use that to calculate gradient of L
Gradient of K is the same.
Gradient is 8/2 = 4

So E is the only option that fits that...

 

[Dark Destination]

Oh wait. It's A.. that fits 4 as the gradient.

 

[Anum96]

Oh wait. It's A.. that fits 4 as the gradient.

Yes, It's A. Thank you, Sir!

 

[Anum96]

Rizwan Javed
I just realized inbox is no use for files. so here u go :3

 

[Anum96]

I'm getting 1/5 which is wrong. Dont know why.

 

[Anum96]

Also, In this the answer key says 18 when it should be 27
18 corresponds with the returning journey :/

 

[Dark Destination]

View attachment 58852
I'm getting 1/5 which is wrong. Dont know why.

Is the answer 1?

 

[Anum96]

Is the answer 1?

Are you ever wrong? I mean, yes! How?

 

[Rizwan Javed]

View attachment 58852
I'm getting 1/5 which is wrong. Dont know why.

it's 1. first solve for p ant t.

you'll get p = 2 or -2
or t = 3 or -3

so the points of intersection when the gradient will be maximum are : (5, 3) & (0, -2)

so slope = 3-(-2)/5-0
= 1

 

[Anum96]

it's 1. first solve for p ant t.

you'll get p = 2 or -2
or t = 3 or -3

so the points of intersection when the gradient will be maximum are : (5, 3) & (0, -2)

so slope = 3-(-2)/5-0
= 1

Thank youu! O_O

 

[Rizwan Javed]

View attachment 58853
Also, In this the answer key says 18 when it should be 27
18 corresponds with the returning journey :/

The answer's 18.

look in the morning he travels with speed = 45 mi/h
when coming he drives at 30mi/h

let distance be d.

make an equation:
time taken in morning = d/45
time taken coming back = d / 30

so,

d/30 +d/45 = 1

solve it you'll get
d = 18 miles

 

[Anum96]

The answer's 18.

look in the morning he travels with speed = 45 mi/h
when coming he drives at 30mi/h

let distance be d.

make an equation:
time taken in morning = d/45
time taken coming back = d / 30

so,

d/30 +d/45 = 1

solve it you'll get
d = 18 miles

Oh damn.
Thank you. Distinction holder to be

 

[Rizwan Javed]

Oh damn.
Thank you. Distinction holder to be

lol... No problem, Math's Master

 

[Anum96]

 

[***amd***]

View attachment 58888

E

 

[Anum96]

E

Yes. How?

 

[***amd***]

Yes. How?

if you have ANY +ve integer k, doesnt matter if it is odd or even, the value '2k' is always even.
since 2k is even, 2k+1 is odd.
any product of an odd and an even number is even.
so 2*odd = even
2(2k + 1) = even i.e. double the odd number = 4k + 2

 

[Anum96]

if you have ANY +ve integer k, doesnt matter if it is odd or even, the value '2k' is always even.
since 2k is even, 2k+1 is odd.
any product of an odd and an even number is even.
so 2*odd = even
2(2k + 1) = even i.e. double the odd number = 4k + 2

Thank you so much!