Junior
Cert higher Maths Paper 1.
Solutions
Question 1.
(1)£15,000.(ii)2.5hours.(iii)Length 12
.(iv)6.(v)
(vi){1,7}
(vii)a = 7.5,(viii)x = 2/3,x= -4.(ix)
(x) 
Question 2:
Perimeter is 172cm,Area is 1708 cm2.
(b) Volume of the cylinder is 
,radius is 
Question 3:
(a) (i)
4x(5y-x) .(ii) (5x+1)(x-2) (iii)
(b)
©The
equation becomes 
-8.55,-.45
Question
4
(a)
(i)
1008, (ii) 336
(b)
Score |
<10 |
<20 |
<30 |
<60 |
<100 |
|
No of People |
5 |
17 |
32 |
46 |
50 |
The
Median is 26.The number of people who scored between 25 and 50 is about 16.the
interquartile range is about 19.
Question
5:
|
x |
-2 |
-1 |
0 |
1 |
2 |
3 |
|
3 |
3 |
3 |
3 |
3 |
3 |
3 |
|
3x |
-6 |
-3 |
0 |
3 |
6 |
9 |
|
|
-8 |
-2 |
0 |
-2 |
-8 |
-18 |
|
y |
-11 |
-2 |
3 |
4 |
1 |
-9 |
The
couples are
(-2,-11),(-1,-2)(0,3)(1,4)(2,1)(3,-9)
f(2.5)=-2. f(x) = 0 when x = -.7, x = 2.2 The maximum value of f(x) is 4.1
(b)
g(-4)= -
7.g(x) = 0 when x = 3 or –3
g(4) =
-7 ,gog(2)= -16 therefore g(4)>gog(2)
Question
6:
(a)x =
1,y = -4.
(b)
©1/2(4x)(3x)=
121.5
