Revision on Topics 3 and 4

Evaluate the expression for the given value of x. 1. 4.5 + x when x = 1.5

Evaluate the expression for the given value of x. 2. 3(16 - x) / (2x) when x = 10

Evaluate the expression for the given value of x. 3. 0.5x^2 + x – 20 when x = 10

Evaluate the expression for the given value of x. 4. x^4 + 6(x – 12) when x = 12

Copy the statement, replacing the question mark with a number or an expression that makes the statement true. 5. 2(4 + ?) = 8 + 6x

Find the values of x that satisfy the inequality x < 7. Then graph the solutions for x on the number line.

Tell whether the expressions are equivalent and explain your reasoning. 7. 4(x + 7) and 4x + 7

Use the Distributive Property to write an equivalent expression. 8. a. 2.2(3x + 2) b. 4x + 8

Which of the following expressions are equivalent? Circle your answers. 9. a. 8x – 12x + 4, 12x – 4(4x – 1), 4 – 4x, 4(1 – 4x) b. Explain your reasoning. c. If an expression is not equivalent to the others, write an expression that is equivalent to it.

The tour operators thought it would be a good idea to get a souvenir T-shirt for each customer who went on the Ocean Bike Tour. They found a company who would sell them shirts with their logo for $6.25 each. a. Make a table and a graph that show number of shirts and cost. b. Write an equation that shows how to determine the T-shirt cost for any number of customers. c. How many shirts did the company buy if their total cost is $100? Explain how you found your answer.