General Thoughts: Mathematics (2 Viewers)

[Blurgh]

Here are my long answers (i can remember correctly):
(proof)
(proof)
$1199

22.5km/hr
18km
6km/hr

26m
3:10
17 degrees

(in diagram)
t = 26
4
t = 4s -2
41

can anyone confirm???

First and second one is correct.

9180 + 34000 = 43180
43180 / 36 = $1199

I thought it was s = 4t since one square = 4 triangles, tried to use logic... failed.

Also.. that means i forgot to minus 2, meaning i got the last one wrong too. I got 43. Grr

 

[RealiseNothing]

Working out responses

81)
a) $40,000 times 0.15 = $6000
b) $34,000 owing, times by 0.27, you get $9180
c) $34000+$9180=$43180
$43180/36= $1199

82)
a) draw on graph
b) 22.5 km/ph
c) 18km
d) 6km/ph

83)
a) tan30=15/x
x=15/tan30
x=26m
b)i) ratio of 3:10
b)ii)(tan^-1)x = 3/10
x=17 degrees

84)
a) draw in shapes
b) 26
c) t=4s-2
d) 4
e) 41

 

[purplemoon]

I think i got like 9 km/h or something for the increase :s

 

[zombies]

Looks like I'm getting everything right so far!

 

[lath]

Working out responses

81)
a) $40,000 times 0.15 = $6000
b) $34,000 owing, times by 0.27, you get $9180
c) $34000+$9180=$43180
$43180/36= $1199

82)
a) draw on graph
b) 22.5 km/ph
c) 18km
d) 6km/ph

83)
a) tan30=15/x
x=15/tan30
x=26m
b)i) ratio of 3:10
b)ii)(tan^-1)x = 3/10
x=17 degrees

84)
a) draw in shapes
b) 26
c) t=4s-2
d) 4
e) 41

same as me

 

[dionb2014]

I think i got like 9 km/h or something for the increase :s

the INCREASE was not 9. That was one of the two speeds, Cannot remember which one.

 

[zombies]

the INCREASE was not 9. That was one of the two speeds, Cannot remember which one.

Yeah i think that might've been his original speed.

 

[purplemoon]

Oh yeah true that ...

 

[twinklegal19]

His original speed was 9 km/h and he needed to travel at 15 km/h to make it a7 4 pm I think, so 6 km/h increase?

 

[dionb2014]

for the quest 84 the rule was s=4t-2 right?

 

[zombies]

His original speed was 9 km/h and he needed to travel at 15 km/h to make it a7 4 pm I think, so 6 km/h increase?

Yep, sounds about right.

 

[purplemoon]

This is probably gonna make me sound like a complete idiot..... but at one point the formula sheet actually did help me.

 

[dionb2014]

there is one question i KNOW i got wrong in the non calculator because when I got my calculator I did the math and found out I was wrong. it was the
A*B=1-A/B question

 

[Blurgh]

This is probably gonna make me sound like a complete idiot..... but at one point the formula sheet actually did help me.

Helped me with the trapezium, you're not alone.

 

[CrackerMo]

there is one question i KNOW i got wrong in the non calculator because when I got my calculator I did the math and found out I was wrong. it was the
A*B=1-A/B question

What? You could have changed it since it is all on the same answer sheet...

 

[Queenroot]

i got 2.2~~km/h (cant remember) for the increase in speed :/

same.

 

[onedirection]

is there any difference between a trapezoid and a trapezium?

 

[dionb2014]

What? You could have changed it since it is all on the same answer sheet...

I am officially a retard. This is a very sad day.

 

[RivalryofTroll]

What would happen if I wrote s = t+2/4 instead of t = 4s - 2 D:

 

[leesh95]

Does anyone know how they calculate the marks of the correct incorrect section because my teacher said they add up all the correct answers and divide them by 4.
Is it true?