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Worksheetsalgebra substitution
Total questions: 20
Worksheet time: 34mins
Name
Class
Date
1.
If a = 4 and b = 6, what is the value of 3a + 5b?
a)
40
b)
42
c)
44
d)
46
2.
If x = 5, find the value of 7x-1.
a)
34
b)
36
c)
35
d)
37
3.
If y = 4, find the value of 3y+5.
a)
27
b)
12
c)
17
d)
18
4.
If y = 7, find the value of 2(y+4).
a)
11
b)
22
c)
20
d)
12
5.
Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a
2a
a)
5
b)
6
c)
8
d)
10
6.
Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab
3ab
a)
10
b)
12
c)
15
d)
36
7.
Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a2 + c2
2a2 + c2
a)
22
b)
34
c)
68
d)
43
8.
Work out the value of the expression when x = 3, y = – 2 and z = – 4.
2x2 + z2
2x2 + z2
a)
2
b)
27
c)
50
d)
34
9.
If y=7,find the value of 2(y+4)
a)
11
b)
22
c)
20
d)
18
10.
If a=6 and b= 7,find the value of 15-a-b
a)
2
b)
3
c)
4
11.
If a=4,b=5 and c=6,find 2c-a-b
a)
4
b)
3
c)
6
12.
When x = 3, y = 6 and z = 7, find 2x - z
a)
-1
b)
-2
c)
-3
d)
-4
13.
If p=2 and q= -5, then pq=
a)
10
b)
-10
c)
7
d)
-7
14.
If a=3, and b= -1, then (ab)2 =
a)
-3
b)
-9
c)
3
d)
9
15.
If x= -4, y=2 and p=3, then (x/y)p =
a)
-8
b)
-1/8
c)
1/8
d)
8
16.
If x= -3, y=4 and z= 1, evaluate 2x + 3y -5z
a)
-1
b)
13
c)
-13
d)
1
17.
Given x= -3 and y=2, find 9xy/6
a)
9
b)
54
c)
-54
d)
-9
18.
If r= -3 and s=0, then (rs)2 =
a)
-3
b)
0
c)
3
d)
9
19.
If a= -2 and b= -3, then 20 - a + b =
a)
15
b)
21
c)
19
d)
-19
20.
If a=4, b= -3 and c=0, then 3a + 3b + 3c =
a)
-3
b)
6
c)
3
d)
-6
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