The average annual wage (in thousands of dollars) for teachers in a country at various grade levels is shown in matrix W. A small school district has both city schools and county schools; matrix N shows the number of teachers in each. Complete parts (a) through (c) below. C... Finish calculating the product NW. NW= (Type an integer or simplified fraction for each matrix element.) (b) Explain what NW represents. Preschool and Kindergarten Elementary and Middle School Secondary School City County Preschool and Kindergarten 26 5 Wage (thousands) 32 59 50 Elementary and Secondary Middle School School 41 8 (a) Find the matrix product NW. Write the expression to obtain the first row and first column of the product NW, using the entries of N and W. (Do not perform the calculation.) 60 10 =W =N
The average annual wage (in thousands of dollars) for teachers in a country at various grade levels is shown in matrix W. A small school district has both city schools and county schools; matrix N shows the number of teachers in each. Complete parts (a) through (c) below. C... Finish calculating the product NW. NW= (Type an integer or simplified fraction for each matrix element.) (b) Explain what NW represents. Preschool and Kindergarten Elementary and Middle School Secondary School City County Preschool and Kindergarten 26 5 Wage (thousands) 32 59 50 Elementary and Secondary Middle School School 41 8 (a) Find the matrix product NW. Write the expression to obtain the first row and first column of the product NW, using the entries of N and W. (Do not perform the calculation.) 60 10 =W =N
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:The average annual wage (in thousands of dollars) for teachers in a country at various grade
levels is shown in matrix W. A small school district has both city schools and county schools;
matrix N shows the number of teachers in each. Complete parts (a) through (c) below.
Preschool and Kindergarten
Elementary and Middle School
Secondary School
Finish calculating the product NW.
NW= (Type an integer or simplified fraction for each matrix element.)
(b) Explain what NW represents.
City
County
Preschool and
Kindergarten
26
5
Wage
(thousands)
32
59
(a) Find the matrix product NW. Write the expression to obtain the first row and first column of the product NW, using the entries of N and W.
(Do not perform the calculation.)
50
Elementary and Secondary
Middle School School
41
8
=W
60
10
= N
Transcribed Image Text:(b) Explain what NW represents.
The rows represent
and the columns represent the
(c) According to matrix NW, what is the total cost of teacher wages in city schools? In county schools? In the entire school district?
The cost of teacher wages in city schools is $
is $
thousand.
thousand. The cost of teacher wages in county schools is $ thousand. The cost of teacher wages in the entire district
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