Cramer's Rule — Unit test Answers

The matrix represents the length of 12 in. and the width of 4 in. of a rectangle. If matrix multiplication is used to double the length and width of the rectangle, which rectangle represents the result of the matrix multiplication?

What is the product?

Using Cramer’s Rule, what is the value of x in the solution to the system of linear equations below?

Using Cramer’s Rule, what is the value of y for the solution to the system of linear equations below?

Write the augmented matrix for each system of equations.a.c.b.d.

Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.a.c.b.d.

Tickets to the zoo cost $4 for children, $5 for teenagers and $6 for adults. In the high season, 1200 people come to the zoo every day. On a certian day, the total revenue at the zoo was $5300. For every 3 teenagers, 8 children went to the zoo. How many adults went to the zoo?

Each column of the matrix represents a vertex of a rectangle on the coordinate plane. If Fan scales the rectangle by finding 4A, what are the vertices of the scaled rectangle?

Using Cramer’s Rule, what are the values of x and y in the solution to the system of linear equations below?

Tickets to a concert cost $2 for children, $3 for teenagers and $5 for adults. When 570 people attended the concert, the total ticket receipts were $1950. Three-fourths as many teenagers as children attended. How many adults attended?

Using Cramer’s Rule, what is the value of x in the solution to the system of equations below?

What is the product?

If , what is 4R?

Each column of the matrix represents a vertex of a triangle. If Rosa scales the triangle by finding 3T, what are the vertices of the scaled triangle?

What is the product?

Based on the information below, what are the values of x and y of the solution to the system of equations used to create the information?, ,

Write the augmented matrix for each system of equations.a.c.b.d.

Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.a.c.b.d.

What is the product?

Using Cramer’s Rule, what is the minimum number of determinants that are needed to solve for all unknowns in the system of linear equations below?