1.
Use elimination to solve the system of equations given below.
5
x
+ 3
y
= 3
3
x
+ 4
y
= 15
A.
(3, -4)
B.
(-3, 6)
C.
D.
(5, 0)
Hint
2.
Use elimination to solve the system of equations given by 6
x
+ 15
y
= 15 and 4
x
– 5
y
= 25.
A.
no solution
B.
infinitely many solutions
C.
(5, -1)
D.
(10, -3)
Hint
3.
Use elimination to solve the system of equations given by 8
x
– 4
y
= -20 and 10
x
– 5
y
= 35.
A.
no solution
B.
(0, 0)
C.
infinitely many solutions
D.
(-12, -12)
Hint
4.
Use elimination to solve the system of equations given by 3
x
+ 4
y
= 5 and 21
x
+ 28
y
= 35.
A.
infinitely many solutions
B.
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.
9.75 mph
B.
6.92 mph
C.
9.23 mph
D.
2.25 mph
Hint