Substitution
Solve the system by substitution:
y = x-4
y = 2x
(-4, -8)
Solve by elimination:
x+y = 3
-x+y = 5
(-1, 4)
Find the solution by graphing:
y = -2x+5
y = 1/2x-5
(4, -3)
Factor:
x2-8x-20
(x-10)(x+2)
Would you graph a solid or a dashed line for the following equation?
y > x+3
Dashed
Solve the system by substitution:
y = 4x-9
y = x-3
(2, -1)
Solve by elimination:
-8x-10y = 24
6x+5y = 2
(7, -8)
#6 on Test Review
Find the solution by graphing:
3x-4y = 12
y = 3 (horizontal line)
(8, 3)
Set the equations equal to each other and move everything to one side.
(Answer should look like 0 = ________)
y = x2+3x-5
y = x +3
0 = x2+2x-8
Would you shade up or down for the following equation?
y > x+3
Solve the system by substitution:
x+7y = 0
2x-8y = 22
(7, -1)
#1 on Test Review
Solve the system by elimination:
4x+6y = 2
2x+3y = -4
No solution
#8 on Test Review
Find the solution by graphing:
-2x+y = 9
4x+2y = -6
(-3, 3)
Set the equations equal to each other and move everything to one side.
(Answer should look like 0 = ________)
y = x2+6x+10
y = -2x-6
0 = x2+8x+16
Would you shade up or down for the following equation?
y < x2+4x-6
Down
Solve the system by substitution:
4x+2y = 10
x-y = 13
(6, -7)
#2 on Test Review
Solve the system by elimination:
2x-8y = -6
-x+4y = 3
Infinitely many solutions
#7 on Test Review
Find the solution by graphing:
2x-5y = 10
-4x+10y = -20
Infinitely many solutions
Solve the system algebraically:
y = x2+3x-5
y = x +3
(-4, -1) and (2, 5)
Find the vertex, then state whether you graph a dashed or solid line, and if you shade up or down.
y > x2-4x+2
(2, -2)
Dashed
Up
#4 on Test Review
Solve the system by substitution:
-2x-4y = -14
3x-5y = -34
(-3, 5)
#3 on Test Review
Solve the system by elimination:
5x-4y = 25
3x+5y = -22
(1, -5)
#9 on Test Review
Find the solution(s) by graphing:
y = x-2
y = x2-4x+2 (change this on your review)
(1, -1) and (4, 2)
Solve the system algebraically:
y = x2+6x+10
y = -2x-6
(-4, 2)
#11 on Test Review
Graph the inequalities:
-x+y > -4
x+y < 3
Check on Review