Exam 2: Introduction to Real Numbers and Algebraic Expressions

Write the word or phrase that best completes each statement or answers the question. Use the commutative and/or associative laws to rewrite the given expression. Label each step with a reason. -x(y9) as 9(xy)

Multiply. -20 · (-4.65)

Remove parentheses and simplify. --4.9(9r + 9) + 3.9(5r + 7)

Simplify. -

Write an inequality with the same meaning. -

Multiply. -7(a +B)

Collect like terms. --12y - 8x - 4x

Divide. -

Simplify. -4[49 + 8(6 + 8)]

Solve the problem. -Julie averages 26 miles per gallon of gasoline in her car. How far can she travel on 14 gallons of gasoline?

Simplify. -23(-22) + 27(-29)

Rewrite the division as a multiplication. -8 ÷ 17

Subtract. -0 - (-16)

Translate to an algebraic expression. -Monica had $23 before spending y dollars for a snack. How much money remains?

Multiply. -3(7 + m)

Multiply. -

Add. Do not use a number line except as a check. --43 + 7.8 + (-12.2) + (-29) + 58

Evaluate -x for the given value of x. -x = 3

Write the word or phrase that best completes each statement or answers the question. -According to the rules for the order of operations, what should be the first step when simplifying the expression [-6 + (-9 + 7)] + (-7 + 6)?

Simplify. -