Plug In Number Substitution

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

• 7
• 8
• 9
• 6

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.
3ab

• 10
• 12
• 15
• 36

Work out the value of the expression when x = 3, y = – 2 and z = – 4.
y + x – z     

• -5
• -3
• 3
• 5

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

• 40
• 42
• 44
• 46

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

• 34
• 36
• 35
• 37

If y = 4, find the value of 3y+5.

• 27
• 12
• 17
• 18

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

• 2
• 3
• 4
• 5

If p = 3 and q = 5, find p + q + 2

• 12
• 10
• 8
• 11

If a = 2, b = 3, c = 4 and d = 5, find a + b + c + d

• 14
• 12
• 15
• 13