CCA Chapter 4 Test Review

Front

What is the cost formula for a large pizza at Palanzio’s Pizzeria with toppings?

Back

Cost = $6.80 + $0.90 * (number of toppings)

Front

What is the cost formula for a large cheese pizza at Guido’s Pizza with toppings?

Back

Cost = $7.30 + $0.65 * (number of toppings)

Front

How do you determine the number of toppings for equal pizza prices at two pizzerias?

Back

Set the cost equations equal to each other and solve for the number of toppings.

Front

What is the solution set for the equation −2|−2r − 4| = -12?

Back

{1, -5}

Front

How do you solve an absolute value equation?

Back

Isolate the absolute value expression and set up two separate equations.

Front

In a problem involving animals in a pasture, how do you set up equations based on the number of legs?

Back

Let x = number of horses and y = number of chickens. Use the equations: x + y = total animals and 4x + 2y = total legs.

Front

What is the total number of legs for horses and chickens if there are 28 animals?

Back

Horses have 4 legs and chickens have 2 legs, so the total legs equation is 4x + 2y = 80.

Front

What type of lines represent a system of equations with infinite solutions?

Back

The same line (coincident lines).

Front

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

Back

The lines are parallel and never intersect.

Front

How do you solve a system of equations using substitution?

Back

Solve one equation for one variable and substitute that expression into the other equation.