Download Practice B Practice B

LESSON
1-1
Practice B
Evaluating Algebraic Expressions
Evaluate each expression for the given value of the variable.
1. 6x + 2 for x = 3
2. 18 − a for a = 13
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3.
1
y for y = 16
4
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4. 9 − 2b for b = 3
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Evaluate each expression for the given values of the variables.
5. 2x + y for x = 7 and y = 11
6. 4j − k for j = 4 and k = 10
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7. 7(n − m) for m = 4 and n = 15
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8. w(14 − y) for w = 8 and y = 5
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9. If m is the number of minutes a taxi ride lasts, then 2 + 0.35m
can be used to find the cost of a taxi ride with Bill’s Taxi
Company.
How much will it cost for a 12-min taxi ride?
LESSON
1-2
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Practice B
Writing Algebraic Expressions
Write an algebraic expression for each word phrase.
1. 6 less than twice x
2. 1 more than the quotient of 21 and b
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3. the sum of 11 times s and 3
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4. 7 minus the product of 2 and x
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Holt McDougal Mathematics
Write a word phrase for each algebraic expression.
5. 2n + 4
6. 3r − 1
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7. 10 − 6n
8. 7 +
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LESSON
1-3
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2
c
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Practice B
Properties of Numbers
Use properties to determine whether the expressions are
equivalent.
1. (8 + 2d) + 3m and 8 + (2d + 3m)
2. 45 − 6y and 6y − 45
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3. 7(18r + 13) and 126r + 20
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4. 16w(0) = 0
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Find a counterexample to disprove each conjecture.
5. A rational number is always an integer. _______________________________________________
6. The sum of two prime numbers is always a prime number.
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7. The absolute value of a whole number is always positive.
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8. The difference of two whole numbers is always a whole number. ____________________
9. Felipe wanted to triple a recipe he was using to make an apple pie. The original
recipe used 8 apples and 2 cups of flour. How many apples and how much flour
should Felipe use?
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Holt McDougal Mathematics