Review

Front

What is the elimination method in solving systems of equations?

Back

The elimination method involves adding or subtracting equations to eliminate one variable, making it easier to solve for the other variable.

Front

Solve by elimination: 4x + 9y = 28 and -4x - y = -28

Back

(7, 0)

Front

What is a system of equations?

Back

A system of equations is a set of two or more equations with the same variables that can be solved together.

Front

What does it mean for a relation to be a function?

Back

A relation is a function if each input (x-value) has exactly one output (y-value).

Front

Is the relation {(11, 2), (11, 3)} a function? Why?

Back

No, because the x-value 11 has two y-values (2 and 3) paired with it.

Front

What is the solution to the system of equations: 2y + 2x = -18 and y = 7x + 9?

Back

(-2, -5)

Front

Solve: y = 7x + 9 and 2y + 2x = -18

Back

(-2, -5)

Front

What is the graphical representation of a system of equations?

Back

The graphical representation is the point(s) where the lines of the equations intersect.

Front

What does it mean if two lines are parallel in a system of equations?

Back

If two lines are parallel, it means there is no solution to the system, as they never intersect.

Front

What is the solution to the system of equations: x + y = 4 and x - y = 2?

Back

(3, 1)