1.
What is the first step in solving the system of equations using the elimination method?
A.
Subtract the second equation from the first equation.
B.
Multiply the second equation by 2.
C.
Add the equations.
D.
Solve the first equation for
x
.
Hint
2.
Use the substitution method to solve
m
-
n
= 7 and 3
m
+ 2
n
= 6.
A.
B.
(-5, 2)
C.
(-3, -10)
D.
(4, -3)
Hint
3.
The equations
y
= -0.38
x
+ 56.6 and
y
= 0.38
x
+ 43.4 represent the percent of men and women, respectively, receiving bachelor's degrees, where
x
is the number of years since 1968. In approximately what year did the same percent of men and women receive bachelor's degrees?
A.
1980
B.
1990
C.
1995
D.
1985
Hint
4.
Solve the system of equations.
–2
x
+ 3
y
= 7
4
x
– 6
y
= 8.
A.
y
= –22,
x
= 29.5
B.
y
= –22,
x
= –31
C.
no solution
D.
y
= –22,
x
= –36.5
Hint
5.
Solve the system of equations
3
x
– 5
y
= 4
–2
x
+ 4
y
= 3.
A.
B.
C.
D.
Hint