1.
Which is not a method for solving a system of equations?
A.
graphing
B.
elimination
C.
solving for y
D.
substitution
Hint
2.
Select the system of equations in which both equations will need to be multiplied by some number in order to be solved by the elimination method.
A.
x
+
y
= 14 and
x
+
y
= 10
B.
4
x
+ 5
y
= 10 and 3
x
– 2
y
= 16
C.
x
–
y
= 5 and
x
+ 2
y
= 13
D.
–3
x
+ 2
y
= 8 and –3
x
–
y
= –2
Hint
3.
A boat traveling on the Snake River travels 24 miles upstream in 3 hours. The return trip takes the boat only 2 hours. Find the rate of the boat in still water.
A.
8 mph
B.
12 mph
C.
10 mph
D.
2 mph
Hint
4.
Use elimination to solve 4
x
– 3
y
= 3 and
x
+
y
= 0.
A.
B.
C.
D.
Hint
5.
Mike is paddling a sailboat at the same speed upstream and downstream. If it takes Mike 15 minutes to paddle a quarter of a mile upstream to his favorite reading spot and 5 minutes to paddle back home. How fast does Mike paddle?
A.
2 mph
B.
1 mph
C.
1.5 mph
D.
3 mph
Hint