Page 81 - Algebra 1

Lesson Practice
Practice
Distributed and Integrated
Simplify each expression. 2. -18÷3
(11)
4. (-3)(-2)(-1)(-8) (11)
*5.
(12)
6.
(SB 7)
7.
(SB 15)
*8.
(12)
9.
(10)
3. ⎪12-30⎥ (5)
66
Saxon Algebra 1
Identify each property illustrated.
(Ex 1)
a. 5+(9+8)=(5+9)+8 b. 0+10=10
c. 15·3=3·15
d. 17·1=17
Tell whether each statement is true or false. Justify your answer using the properties. Assume all variables represent real numbers.
(Ex 2)
e. (ab)c = a(bc)
f. m-z=z-m g. w+0=w
Simplify each expression. Justify each step.
(Ex 3)
h.
i.
j.
(Ex 4)
18+7x+4 _1 d · 3
3
Erasers, markers, and paper can be purchased at the school store for the following prices, respectively: $1.45, $3.35, and $2.65. Find the total cost of the supplies. Justify each step.
*1. Identify the property illustrated in the equation 100 · 1 = 100. (12)
True or False: p(q + r) = (p + q)r. Justify your answer using the properties. Write a fraction equivalent to _2 .
3
True or False: The sum of the measures of complementary angles is 90°.
Multiple Choice Which equation demonstrates the Identity Property of Addition?
A a·0=0
B a+0=a C a · _1 = 1
a
D a+1=1+a
Add _11 + _1 + _3 . 15 30 60