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Write an equivalent expression. Use a commutative law.
Write an equivalent expression. Use an associative law.
A
SHORT ANSWER. 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.
A
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
List the terms of the expression.
Factor. Check by multiplying.
-9 + 6m – 12n + 6m + 7n + 2
7
3x +5
6y –1
3x –1
3y +19
Find an equivalent expression without parentheses.
Remove parentheses and simplify.
–7.6(3r + 9) + 8.5(4r + 6)
(9x –6y +3) – 2(–9x +6y –3)
[3(x –4) –3] + [9(x – 1) +9]
3{[6(x – 1) +3] – [2(3x – 1) +3]}
D
7· (6+ 8) + 7 ·2
7· (6– 1)
Provide an appropriate response.
There is a distributive property for multiplication with respect to addition: a(b + c) = ab + ac. Is there a
distributive property for division with respect to subtraction? If so, state the property.
Yes. a/(b – c) = a/b – a/c
Choose the expression that is equivalent to the following: 0 + 5b
Choose the expression that is equivalent to the following: 5(7a) + 5(3b)
Choose the expression that is equivalent to the following: 18x + 3y
Choose the expression that is equivalent to the following: (7x + 5y)(7y + 2x)
Choose the expression that is equivalent to the following: (7x + 4y)(9y3)
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Is the integer 0 positive or negative? Explain.
Is this statement true or false? Why?
(2 – 2) – 2 =2– (2– 2)
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
According to the rules for the order of operations, what should be the first step when simplifying the expression
[-5 + (-9 + 3)] + (-4 + 9)?
find the sum of -5 and -4
find the sum of -5 and -9
Choose the expression that is equivalent to the following: 1(6x3)