1.
Solve
A.
B.
7
C.
D.
10
Hint
2.
Solve
A.
-1, 4
B.
1, 4
C.
0
D.
-1
Hint
3.
Suppose that Pam could build a house in
months and Jerry could build a house in
months. If they work together, how long would it take them to build the house?
A.
5 months
B.
months
C.
months
D.
10 months
Hint
4.
Solve
. Check your solution.
A.
6 and –2
B.
–2
C.
6
D.
–4
Hint
5.
Solve
.
A.
0 and 7
B.
–
and 7
C.
7
D.
–
Hint
months and Jerry could build a house in 
months. If they work together, how long would it take them to build the house?