Riddles
Graphing Pt 1
Graphing Pt 2
vocabulary
combine like terms
100
I have lakes with no water, mountains with no stone and cities with no buildings. What am I?
A map
100
-2x-9y = -25
-4x-9y = 23
(-1, 3)
100
y = 2x + 2
y = x - 1
(3,-4)
100
what are the 3 methods of solving systems of equations
elimination
graphing
substitution
100
3g -5g
-2g
200
Which is heavier: a ton of bricks or a ton of feathers?
They weigh the same amount
200
y = x + 1
2x + y =10
(3,4)
200
y = 2x + 5
y = x + 3
(-2,1)
200
How many equations are there in a system of equations?
two or more
200
4a +5b +6a -9b
10a -4b
300
Mary has four daughters, and each of her daughters has a brother. How many children does Mary have?
Five—each daughter has the same brother.
300
y = 5x - 1
2y = 3x + 12
(2,9)
300
3x - 2y = 8
x + y = 6
(4,2)
300
How can you tell if a linear system has infinitely many solutions?
the equations are the same and the lines lie on top of each other
300
3(x+y) +3x - y
6x +2y
400
The person who makes it has no need of it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?
A coffin
400
2x - 3y = -2
y= -4x + 24
(5,4)
400
y = 1/2x + 2
y = 1/4x + 4
(8,6)
400
what does it mean when the lines are parallel or they have the same slope and different y-intercepts or when you solve the equations and get a false statement with no variables remaining.
no solution
400
3(2x-6y) +4 - 8 +7y -3x
3x - 11y - 4
500
What month has 28 days?
All of them
500
x + y = 10
-y = 5 + x
no solution
500
4x - 5y = 15
8x + 5y = 45
(5,1)
500
The method of solving equations where you add or subtract equations to end up with one variable.
elimination
500
-3(2x - 8y) +7(5x - 4y)
29x - 4y