Download Chapter 12: Data Presentation Review

Algebra I
Chapter 6 Review
Chapter 6 Review
1) Solve by substitution.
a) y = x – 1
y = -3x - 5
b) -5x -4y = 4
6x + 2y = 12
Chapter 6 Review
1) Solve by substitution.
a) y = x – 1
(-1, -2)
y = -3x - 5
b) -5x -4y = 4
6x + 2y = 12
(4, -6)
Chapter 6 Review
2) Solve by elimination.
a) 5x - 4y = -3
3x - 4y = -5
b) 3y = 4x - 12
3x - 2y = 9
Chapter 6 Review
2) Solve by elimination.
a) 5x - 4y = -3
(1, 2)
3x - 4y = -5
b) 3y = 4x - 12
3x - 2y = 9
(3, 0)
Chapter 6 Review
3) Solve by graphing.
a) -5x - 4y = 4
3x + y = 6
Chapter 6 Review
3) Solve by graphing.
a) -5x - 4y = 4
3x + y = 6
y
5
-5x - 4y = 4
-4y = 5x + 4
y = -5/4 x -1
3x + y = 6
y = -3x + 6
-5
5
-5
x
(4, -6)
Chapter 6 Review
4) Solve.
a) y < 3x - 4
y≥x-1
Chapter 6 Review
4) Solve.
a) y < 3x - 4
y≥x-1
y
5
-5
5
-5
x
Chapter 6 Review
5) Solve.
a) y = │x│ - 1
y = x2 - 3
Chapter 6 Review
5) Solve.
a) y = │x│ - 1
y = x2 - 3
y
5
(-2, 1)
(2, 1)
-5
5
-5
x
Chapter 6 Review
6) Solve.
You have 10 coins that total $0.42.
Some are nickels, the rest pennies.
How many of each type are there?
Chapter 6 Review
6) Solve.
You have 10 coins that total $0.42.
Some are nickels, the rest pennies.
How many of each type are there?
2 pennies and 8 nickels
Chapter 6 Review
7) Solve.
An orchestra consists of string
instruments and wind instruments in a
ratio of 9 to 4. There are 91 total
instruments. How many of each
instrument are there?
Chapter 6 Review
7) Solve.
An orchestra consists of string
instruments and wind instruments in a
ratio of 9 to 4. There are 91 total
instruments. How many of each
instrument are there?
28 wind and 63 string