Question

Write each answer in polynomial in simplest form The cost of 12 gallons of gas is represented by 12x, and the cost of a quart of oil is represented by 2x - 30.Represent the cost of 12 gallons of gas and a quart of oil.

Answer 1

The cost of 12 gallons of gas and a quart of oil is 14·x - 30

Explanation:

When adding variables, the coefficient of the variables are added followed by multiplication of the sum of the coefficients with variable as follows;

The cost of 12 gallons of gas = 12·x

The cost of a quart of oil is represented by 2·x - 30

Therefore, the cost of 12 gallons of gas and a quart of oil can be represented as follows;

12 gallons of gas and a quart of oil = 12·x + 2·x - 30

Which gives;

The cost of 12 gallons of gas and a quart of oil = 14·x - 30.