Algebra I
Ch. 6 Warm-ups
Section 6-1 WU, Day 1
Graph the following inequalities. Sketch a
coordinate plane on your WU sheet.
1) y > -3x + 6
1) y < x - 5
Section 6-1 WU, Day 2
Solve the following systems of equations.
Remember: Sketch both lines on the same grid,
then find the point of intersection
1) y = 3x – 2
y = -3x + 4
2) y = -5x + 8
y=x+2
Section 6-2 WU, Day 1
Solve the following systems of equations by
graphing. Be careful of no solutions and infinite
solutions.
1) y = 7x – 5
-7x + y = 2
2) y = -2x + 6
4x + 2y = 12
Section 6-2 WU, Day 2
Solve the following systems using the
substitution method. USE YOUR NOTES
1) y = 5x + 1
2) 2x + y = 3 (solve for y)
4x + y = 10
4x + 4y = 8
Section 6-3 WU
Solve the following systems using substitution. Watch out for
special cases! (No solutions and infinite solutions). Solve for y in
#1 first!
1) 3x + y = -5
6x + 2y = 10
2) y = -3x + 4
-6x – 2y = -8
Section 6-4 WU, Day 1
Solve the following systems using the
elimination method.
1) 5x – 2y = 24
2) 6x – 6y = 6
3x + 2y = 24
3x – 6y = 15
Section 6-4 WU, Day 2
Solve the systems using the elimination method. Note: You will
have to multiply one or both equations by a number FIRST!
1) x – y = -8
7x + 5y = 16
2) 2x + 5y = 11
4x + 3y = 1
Section 6-5 WU
Solve using whatever method you want!
1) 6x + y = -39
2) 5x – y = 5
3x + 2y = -15
x = 3y – 13
Section 6-6 WU, Day 1
State which method would be the best method
to use to solve the system of equations given
how the system is set up. Explain why!
1) 5x + 8y =1
2) y + 4x = 3
-2x + 8y = -6
y = -4x – 1
Section 6-6 WU, Day 2
Sketch a graph of the systems of linear inequalities.
Remember to determine the line (solid or dashed),
shade the appropriate side of the line, and darken
the intersection area
1) y < -2x +7
2) y > 3x - 1
y > -¾x + 5
y < -4x + 1