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Year 8 Substitution
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The value of the expression 5 × a + 2 if a = 3 is:
1 point
25
10
17
55
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Work out the value of ab if a = 10 and b = 15
1 point
25
150
75
50
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If t = 5 and u = 7, then 2t + u is equal to:
1 point
17
32
24
257
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If a = 5 and b = 2 the value of 3ab is:
1 point
352
30
90
13
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If a = 5 and b = 2 the value of 3a – 2b is:
1 point
13
31
3
11
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1 point
16
5
4
8
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If a = 5 and b = 2 the value of 2a² is:
1 point
625
20
50
100
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If x = 2, then 3x² is equal to:
1 point
32
34
12
36
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If a = 2 and b = 3 then 2a + 3b equals
1 point
12
13
25
55
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If x = 3 then 3x − x² equals
1 point
9
0
24
1
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What is the value of the expression 6c² –5d + 8 when c = 5 and d = 4 ?
1 point
48
79
138
888
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If a = −10, b = −4 and c = 3, find the value of a + (3b + c)²
1 point
−91
−13
71
215
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What is the value of 2𝑥² + 4𝑥 + 3 if 𝑥 = 2?
1 point
19
15
9
3
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If a = 3 and b = 4 the value of a²b
1 point
36
144
48
24
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If a = -3 the value of 2a² is
1 point
-36
18
36
-12
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Find the value of w (correct to two decimal places) if y =7
1 point
5.53
8.26
15.75
27.00
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Find the value of w (correct to two decimal places) if y =7
1 point
5.53
8.26
15.75
27.00
Clear selection
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