Math 1 NC Check In #2 REVIEW

Front

What is the total cost for Company Y if a person uses x minutes?

Back

Total Cost = $10 + $0.10 * x

Front

What is the total cost for Company Z if a person uses x minutes?

Back

Total Cost = $0.20 * x

Front

How do you find the number of minutes where both companies cost the same?

Back

Set the total costs equal: $10 + $0.10x = $0.20x and solve for x.

Front

What is the solution for x when $10 + $0.10x = $0.20x?

Back

x = 100 minutes.

Front

What is a system of equations?

Back

A set of two or more equations with the same variables.

Front

How do you solve a system of equations?

Back

You can use substitution, elimination, or graphing methods.

Front

What is the value of y in the system of equations: 2x + 3y = 6 and x - y = 1?

Back

y = 1/2 or 0.5.

Front

What does it mean if a system of equations has no solution?

Back

The lines representing the equations are parallel and never intersect.

Front

What does it mean if a system of equations has infinitely many solutions?

Back

The equations represent the same line, so every point on the line is a solution.

Front

What is the slope-intercept form of a linear equation?

Back

y = mx + b, where m is the slope and b is the y-intercept.