Warm-up
Solve by linear combination.
1.
3.
2x  y  5
3x  2 y  4
8 x  3 y  11
2 x  5 y  27
2.
4.
5x  2 y  6
9 x  2 y  22
4 x  7 y  10
3x  2 y  7
1. Every Person in your group needs a piece of
paper, a pencil, graph paper, and a calculator.
2. Every Person in your group needs a letter, either
T, R, A, S, or H. Put that letter and your group
number at the top of your paper (both sides).
3. Every Person will write down the problem and
solve it on their paper (you may get help from the
members in your group).
4. Only the person whose letter I call will come up
and show me their paper.
5. You get one point for a correct answer.
6. If correct, you can shoot for bonus points. 2 from
the two point line or 3 from the three point line.
1.
Is (14, 5) a solution for
x  14 y  84
2 x  7 y  7
yes
2.
Solve by substituti on.
y  4x
x y 5
(1, 4)
3.
Solve by linear combinatio n.
 x  y 1
x  y  11
(5, 6)
4.
Solve by linear combinatio n.
5 x  2 y  10
3 x  6 y  66
(2, 10)
5.
Solve by graphing.
3x  y  6
 x  y  2
(2, 0)
6.
Solve by substituti on.
x  y 8
2x  y  1
(3, -5)
7.
Solve by linear combinatio n.
3x  4 y  2
4 x  4 y  12
(2, -1)
8.
Solve by linear combinatio n.
5 x  3 y  10
3 x  5 y  6
(-2, 0)
9.
Solve by graphing.
y  x2
y  x  4
(3, 1)
10.
Solve by substituti on.
y  3x
x  2 y  21
(-3, -9)
11.
Solve by linear combinatio n.
3 x  4 y  19
3 x  6 y  33
(-3, 7)
12.
Solve by substituti on.
x  4 y
3 x  2 y  20
(8, -2)
13.
Solve by graphing.
x  2
y3
(-2, 3)
14.
Solve by linear combinatio n.
2x  5 y  3
 x  3 y  7
(4, -1)
15.
Solve by substituti on.
x  4y  8
2 x  5 y  29
(12, -1)
16.
Solve by linear combinatio n.
2x  3y  9
 5 x  3 y  30
(-3, -5)
17.
Solve by linear combination.
3 x  4  2 y
2 y  4 x  10
(2, 1)