Matrices

Multiplication

39. Given matrices X = [-1  0]  and Y = [-2 -1], which of the following matrices is XY ?

Matrix Multiplying

2021 April(Z04) Math Question 39

2019 December(C03) Math Question 43

48. Four matrices are given bwlow. Which of the following matrix products is undefined?

2015 June(73C) Math Question 48

2019 April(Z15) Math Question 51

2019 June(72F) Math Question 57

57. Valley High School and Mountain High School have decided that selected students will attend a daytime theatrical performance that costs $5 for each teacher and $3 for each student. One teacher and 10 students from Valley High will attend, and 2 teachers and 25 students from Mountain High will attend. Which of the following matrix products represents the ticket costs. in dollars, for each high school?

2018 April(A09) Math Question 57

60. The table below shows the numbers of rows and columns in each of 5 matrices.

2017 June(74C) Math Question 60

60. What is the matrix product [2 4 ] [a b] ? _

MultiplicationMatricesACT math questions

2021 April(Z04) Math Question 39

2019 December(C03) Math Question 43