In the following exercise, write the exponent for the given expression.

$$9 \times 9 \times 9 \times 9$$

In the following exercise, evaluate the given expression.

$$5^2-9 \div 3$$

In the following exercise, use properties of operations to complete the equivalent expressions.

$$6(4 s-1)= \underline{\quad} s - \underline{\quad}$$

Write Yes or No to indicate whether the expressions are equivalent.

$6(3 x+1)$ and $9 x+6+9 x$

In the following exercise, evaluate the given expression.

$$(8.2+5.3) \div 5$$

Evaluate the following expression.

$$[20+(2.5 \cdot 3)]-3^3$$

How long will it take a car traveling at a rate of 68 miles per hour to go 510 miles? Show how you know.

In the following exercise, simplify the given expression.

x+x+x+x

How would you write $\left(\frac{1}{2}\right)^3$ as repeated multiplication?

Evaluate each expression for n = 7, x = 4, y = 8, and z = 1.

$$y^2 \div 2 x+3 n-z$$

In the following exercise, use the expression w/4 + 12.5 - 7z.

Which part of the expression is a product of two factors? Describe its parts.

In the following exercise, write an algebraic expression for the given situation.

twice a number n

Choose the best term from the Word List. Write it on the blank.

Word List

• algebraic expression
• base
• coefficient
• equivalent expressions
• evaluate
• exponent
• formula
• like terms
• power
• simplify
• substitution
• terms

A _____ is a quantity that can change or vary.

Yolanda is planning a party that will take place in three rooms. The expression below can be used to represent the total amount Yolanda will need to rent all three rooms for t hours. Let t=5.

$$(25 t+15)+(20 t+10)+50 t$$

Explain how you can evaluate your expression and find the total rental cost Yolanda will pay. Then solve.