Substitution

If x = 5, find the value of 7x-1.

• 34
• 36
• 35
• 37

If p = 3 and q = 5, find p + q + 2

• 12
• 10
• 8
• 11

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a

• 5
• 6
• 8
• 10

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
a + b   

• 7
• 8
• 9
• 6

If a = 4 and b = 6, what is the value of 3a + 5b?

• 40
• 42
• 44
• 46

If a = 6 and b = 7,find the value of 15-a-b.

• 2
• 3
• 4
• 5

Substitute x = 3 into the expression:

x + 5

Substitute x = 5 into the expression:

4x + 5

Substitute x = -1 into the expression:

4x + 6

Substitute x = -2 into the expression:

2x - 5