1.
Use elimination to solve the system of equations given below.
3
x
- 2
y
= 4
2
x
+
y
= -2
A.
B.
C.
D.
(0, -2)
Hint
2.
The sum of two numbers is –11. Twice the first number minus four times the second number is –10. What are the two numbers?
A.
-15, 4
B.
-8, -3
C.
-6, -5
D.
-9, -2
Hint
3.
Use elimination to solve the system of equations given by 6
x
+ 2
y
= 0 and 3
x
+ 7
y
= 24.
A.
B.
no solution
C.
(-1, 3)
D.
infinitely many solutions
Hint
4.
Use elimination to solve the system of equations given by 3
x
+ 4
y
= 5 and 21
x
+ 28
y
= 35.
A.
B.
infinitely many solutions
C.
no solution
D.
Hint
5.
A boat travels 30 miles upstream in 4 hours. The trip downstream takes 2.5 hours. Find the rate of the boat in still water.
A.
2.25 mph
B.
9.23 mph
C.
6.92 mph
D.
9.75 mph
Hint