7.3 Solve Linear Systems by + and ­.notebook
Lesson: 7.3 Date:
LT#4: I can solve a system by elimination.
elimination =
step 1 =
Steps to solve a step 2 =
system by elimination = step 3 =
step 4 = Check your solution
Example:1
Solve the system.
(addition)
2x + 3y = 11
­2x + 5y = 13
Example:2
Solve the system.
(subtraction)
4x + 3y = 2
5x + 3y = ­2
Summary
October 29, 2013
nbp.7
7.3 Solve Linear Systems by + and ­.notebook
IF
Box
October 29, 2013
­Identify the variables
­Write a system One auto repair shop charges $30 for
a diagnosis and $25 per hour for
labor. Another auto repair shop
charges $35 per hour for labor.
t =
t = total cost
h = h = # of hours of labor
Darlene is making a quilt that has alternating stripes of regular quilting fabric($4/yard) and sateen fabric($6/yard). She purchased a total of 16 yards for $76.
q = q = # of yards of quilting fabric
s = # of yards of sateen fabric
7.3 Solve Linear Systems by + and ­.notebook
HW 7.2 p.439(1,5,11,17,19,21,23,26,31-32)
26) (5.5, 9)
32) 22 tubes for a person and 4 'cooler' tubes
October 29, 2013
7.3 Solve Linear Systems by + and ­.notebook
's
y
a
d
s
ur ork
w
October 29, 2013
Tear out and Turn in
p434(1­4) ­sketch graphs, ordered pair
p.441(4­9)­substitution work, sketch graph, ordered pair
7.3 Solve Linear Systems by + and ­.notebook
1­2
Spaeth
3­4
Spaeth
Spaeth
5­6
7­8
Spaeth
October 29, 2013
7.3 Solve Linear Systems by + and ­.notebook
Lesson: 7.3 Date:
LT#4: I can solve a system by elimination.
elimination =
step 1 =
Steps to solve a step 2 =
system by elimination = step 3 =
step 4 = Check your solution
Example:1
2x + 3y = 11
­2x + 5y = 13
Example:2
4x + 3y = 2
5x + 3y = ­2
Summary
October 29, 2013
nbp.7
7.3 Solve Linear Systems by + and ­.notebook
October 29, 2013
7.3 CW #1­Solve the system­nbp.7
8x ­ 4y = ­4
4y = 3x + 14
7.3 Solve Linear Systems by + and ­.notebook
7.3 Class work
1) Complete p.445(4­5)
2) Check answers
3) Raise hand (Spaeth) ­white sheet
4) Start 7.3 HW
-p.447(1, 7, 13, 15, 17, 19, 21, 29, 37, 40)
October 29, 2013
4­5 4. (1, 1)
5. (-2, 0)
1. (-1, -3)
2. (2, -3)
3. (5, 4)
7.3 Solve Linear Systems by + and ­.notebook
October 29, 2013
HW
7.3 p.447(1,7,13,15,17,19,21, 29,37,40)
7.3 Solve Linear Systems by + and ­.notebook
7.3 p.447(1,7,13,15,17,19,21, 29,37,40)
37) (0, 2)
40) flat fee: $14.95
cost of oil; $1.50 per quart
October 29, 2013