Substituting Variables

Write the following statement as a mathematic expression with variable(s):

> Ben has 35 crisps. That is 7 times more than Ryan has.

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Which of these could be a variable?

• w

• 9

• 1,027

What is w - 9 when w = 15?

• 5

• 6

• 24

• 12

What is the value 3y + 1 when y=5?

• 16

• 36

• 6

• 18

Which value of k would make the expression 10 - k equal 3?

• k = 13

• k = 30

• k = k - 3

• k = 7

Evaluate the expression ab + c when a = 2, b = 7, c = 1

• 10

• 14

• 15

• 28

Which expression is equivalent to 12 when b = 2?

• b³ + 2

• 5b - 2

• 9b - 10

• 2(b + 4)

Evaluate each expression below(substitute the variables)