EOC Practice HW #3

Front

What is the formula to calculate the total cost of Kaden's phone bill?

Back

Total Cost = Flat Fee + (Cost per Minute × Number of Minutes)

Front

If Kaden's phone bill is $18 and the flat fee is $12, how do you find the number of minutes he talked?

Back

Subtract the flat fee from the total bill: $18 - $12 = $6. Then divide by the cost per minute: $6 / $0.05 = 120 minutes.

Front

What does it mean for a system of equations to have no solution?

Back

It means that the lines represented by the equations are parallel and never intersect.

Front

How do you find the slope of a line from a graph?

Back

The slope is calculated as the rise (change in y) over the run (change in x) between two points on the line.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

How can you determine how many weeks Sophie needs to save for her jacket?

Back

Set up the equation: Total Amount Needed = Current Amount + (Amount Saved per Week × Number of Weeks). Solve for Number of Weeks.

Front

What is the solution to a system of equations?

Back

The solution is the point where the two lines intersect, representing the values of the variables that satisfy both equations.

Front

How do you solve the equation y = 4x + 1 and 3x + 2y = 13 simultaneously?

Back

Substitute y from the first equation into the second equation and solve for x, then back-substitute to find y.

Front

What is the meaning of 'undefined' slope?

Back

An undefined slope occurs in vertical lines where the change in x is 0, leading to division by zero.

Front

What is a flat fee in a billing context?

Back

A flat fee is a fixed charge that does not change regardless of usage.