In an election, a party hired a firm to promote its candidate in three ways , telephone calls, house calls and letters. The cost per contact (in paise) is respectively 40, 100 and 50. The number of contacts in cities A and B are 1000, 500, 5000 and 3000, 1500 and 7500 respectively. Express the information using matrices and use the algebra of matrices to get the total amount spent in each city,

if A and B are non-singular matrices ,then

Express the following information in mathematical form using variables x and y. The perimeter of a rectangle is 40 cm.

Express the following information in mathematical form using variables x and y: The ratio of two number is 3:8.

Express the following information in mathematical form using variables x and y. The ratio of two numbers is 5:3

Express the following information in mathematical form using variables x and y. The cost of 2 tables and 3 chairs isRs 5400.

Express the following in the scientific notation: 500.0

In a city there are two factories A and B. Each factory produces sports clothes for boys and girls. There are three types of clothes produced in, both the factories type I, II and III. For boys the number of units of types I, II and III are 80, 70 and 65 in factory A and 85,65 and 72 in factory B. For girls the number of units of I, II and III are 80, 75,90 in factory A and 50,55,80 in factory B. Express this information in terms of matrices and using matrix Algebra, answer the following question.(I) What is the total production of each type for boys and girls?

In a city there are two factories A and B. Each factory produces sports clothes for boys and girls. There are three types of clothes produced in, both the factories type I, II and III. For boys the number of units of types I, II and III are 80, 70 and 65 in factory A and 85,65 and 72 in factory B. For girls the number of units of I, II and III are 80, 75,90 in factory A and 50,55,80 in factory B. Express this information in terms of matrices and using matrix Algebra, answer the following questions. (I) How many total units of type I produced for boys?