
a.
To organize the given data in a matrix.
a.

Answer to Problem 1GP
Explanation of Solution
Given:
Data for U.S. Census
Concept used:
A matrix is a rectangular array of scalars usually represented as:
Calculation:
To write the given data in a matrix form, add a column of male entries and a column of female entries.
That is, the matrix would be
The matrix obtained is a
Conclusion:
Therefore, matrix form of the given data is
b.
To add the elements in the columns.
b.

Answer to Problem 1GP
Explanation of Solution
Given:
Data for U.S. Census
Matrix form:
Concept used:
A matrix is a rectangular array of scalars usually represented as:
Calculation:
Adding the columns of the matrix so obtained in part (a.).
For male column,
For female column,
Conclusion:
Therefore, total number of males are
c.
To add the elements in the rows.
c.

Answer to Problem 1GP
Explanation of Solution
Given:
Data for U.S. Census
Matrix form:
Concept used:
A matrix is a rectangular array of scalars usually represented as:
Calculation:
Adding the columns of the matrix so obtained in part (a.).
For first row, population in the age group 0-19:
For second row, population in the age group 20-39:
For third row, population in the age group 40-59:
For fourth row, population in the age group 60+:
Conclusion:
Therefore, total population in the respective age groups is
d.
To find the average of rows and columns.
d.

Answer to Problem 1GP
Explanation of Solution
Given:
Data for U.S. Census
Matrix form:
Concept used:
A matrix is a rectangular array of scalars usually represented as:
Calculation:
For the given data,
Average of columns
Average of rows
Conclusion:
Therefore, the average of columns is
Chapter 3 Solutions
Glencoe Algebra 2 Student Edition C2014
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