General Thoughts: Mathematics (2 Viewers)

Blurgh

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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

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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
 

lath

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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 :)
 
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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?
 

purplemoon

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

dionb2014

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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
 

CrackerMo

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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...
 

RivalryofTroll

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

leesh95

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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?
 

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