What is the solution?
(-1,1)
Solve the systems of equations using substitution:
-3x + 4y = -2
y = -5
(-6, -5)
Solve the systems of equations using Elimination:
14x + 2y = 26
-14x - 6y = -50
(1, 6)
Is the given point a solution to the system of equations?
Point: (2,6)
x + y = 8
3x - y = 0
Yes
12 tacos and 4 small sodas cost $18. 7 tacos and 3 small sodas cost $11.30. Identify what your two variables should represent.
price of taco and price of small soda
How many solutions are there?
No Solutions
Solve the systems of equations using substitution:
-5x - 5y = 10
y = -4x -17
(-5, 3)
Solve the systems of equations using Elimination:
-3x - 5y = 2
3x + 5y = 7
No Solution
Is the given point a solution to the system of equations?
Point: (1/2, -2)
6x + 5y = -7
2x - 4y = -8
No
25 coins, consisting of nickels and dimes, total $1.65. Write two equations, if x = # of nickels and y = # of dimes.
x + y = 25
.05x + .10y = 1.65
Solve Using Graphing:
y = 5/3x + 2
y = -3
Solve the systems of equations using substitution:
y = -2x - 9
3x -6y = 9
(-3, -3)
Solve the systems of equations using Elimination:
-6x - 10y = 4
-3x - 5y = 7
No Solution
What is true of the graph of a system of equations with no solution?
They are parallel
-or-
They have the same slope, but different intercepts
12 tacos and 4 small sodas cost $18. 7 tacos and 3 small sodas cost $11.30. If x = price of taco and y = price of small soda, write two equations.
12x + 4y = 18
7x + 3y = 11.30
How many solutions are there?
Infinitely Many Solutions
Solve the systems of equations using substitution:
-8x - 5y = -24
-x + y = 10
(-2, 8)
Solve the systems of equations using Elimination:
x + 8y = 22
3x + 4y = -14
(-10, 4)
What would you multiply the top equation by if you wanted to eliminate the "x" terms:
0.3x - 0.2y = -2.1
0.6x + 1.3y = 0.9
-2 or 2
Write a system of inequalities to represent the graph:
y > -x - 3
y > 2x + 3
Solve the systems of linear equations by graphing:
Solve the systems of equations using substitution:
-8x + y = -7
16x - 2y = 14
Infinitely Many Solutions
Solve the systems of equations using Elimination:
-5x + 2y = -12
4x - 3y = 11
(2, -1)
What does it mean if a system of equations has infinite solutions?
The lines are the same.
A plane flies 1,992 miles in 4 hours with the wind. If x = plane's speed and y = wind speed, write an equation.
x + y = 498