TI-84 Plus Systems of Equations Quiz

What is the first step in solving systems of equations using the TI-84 Plus?

• Using the quadratic formula

• Entering the equations into a spreadsheet

• Defining variables and writing equations

• Graphing the equations

How do you move a variable to the other side of an equation?

• Divide it by itself

• Add it to both sides

• Multiply it by zero

• Subtract it from both sides

What is the purpose of using reduced row echelon form on the TI-84 Plus?

• To check for errors in the equations

• To graph the equations

• To convert the equations to quadratic form

• To find the unique solution to the system

What indicates a unique solution in a matrix?

• Decimal values in the solution

• All zeros in the matrix

• Three ones going diagonally

• Negative numbers in the matrix

In the coin problem, what does the equation D = 2Q - 1 represent?

• The total number of coins

• The value of nickels

• The total amount of money

• The relationship between dimes and quarters

Why can't the solution to the coin problem be accepted as valid?

• It results in a negative number of coins

• It gives a fractional number of coins

• It doesn't use all the coins

• It doesn't match the total value

What is the first step in solving the word problem using matrices?

• Graphing the problem

• Using the quadratic formula

• Entering the problem into a spreadsheet

• Defining variables and writing equations

What does it mean if a matrix solution has three ones diagonally?

• The system has a unique solution

• The system has infinite solutions

• The system has no solution

• The system is inconsistent

What should you do if a matrix solution gives fractional values for a real-world problem?

• Re-evaluate the problem setup

• Round the values to the nearest whole number

• Accept the solution as is

• Ignore the fractional values

What is the final step after solving a system of equations using the TI-84 Plus?

• Store the solution in a spreadsheet

• Convert the solution to a different form

• Verify the solution in the context of the problem

• Graph the solution