CUA 4 Test Corrections

Front

What is the cost of each hot dog and soda at the concession stand?

Back

Each hot dog costs $1.50 and each soda costs $0.50.

Front

How do you find the solution of a system of linear equations?

Back

The solution is the intersection of the two equations on a graph.

Front

What is the value of y in the system of equations 6x + 10y = -32 and 6x + 9y = -27?

Back

y = -5

Front

How do you solve the equations y=3x+14 and y=-4x by substitution?

Back

Substituting -4x into y=3x+14 gives y = -2.

Front

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

Back

It means that the equations represent the same line on a graph.

Front

What is the total revenue from selling 35 hot dogs and 52 sodas?

Back

Total revenue = (35 * $1.50) + (52 * $0.50) = $78.50.

Front

What is a linear equation?

Back

A linear equation is an equation that makes a straight line when graphed.

Front

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

Back

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

Front

How do you determine the y-intercept of a linear equation?

Back

The y-intercept is the value of y when x = 0.

Front

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

Back

It means the lines are parallel and never intersect.