1.
Select the correct factorization.
A.
66
ax
3
= 2 · 33 ·
a
·
x
·
x
B.
–49
z
3
b
2
= –1 · 7 · 7 ·
z
·
z
·
b
·
b
C.
52
b
2
c
= 2 · 2 · 13 ·
b
·
b
·
c
D.
57
axy
2
= 57 ·
a
·
x
·
y
·
y
·
y
Hint
2.
The product of the prime factors common to two integers is called the _____.
A.
least common denominator
B.
prime factorization
C.
greatest common factor
D.
composite term
Hint
3.
Find the GCF of 30, 45, and 75.
A.
10
B.
5
C.
15
D.
6
Hint
4.
Find the GCF of 36
a
2
b
and 81
ab
2
.
A.
12
ab
B.
9
ab
C.
3
a
2
b
D.
3
ab
Hint
5.
Elaine needs to make a rectangular poster with an area of 30 square centimeters. She needs to use an e
x
pensive border around the perimeter of the poster. Assuming they are whole numbers, find the length and width so that the poster has the least perimeter.
A.
1 cm by 30 cm
B.
10 cm by 3 cm
C.
15 cm by 2 cm
D.
5 cm by 6 cm
Hint