Combining and Understanding Coefficients

The video tutorial explains how to add and subtract variables by combining their coefficients. It starts with an example of adding 9x and 6x, resulting in 15x. The tutorial then covers subtracting variables, explaining that if no number is in front of a variable, it is assumed to be 1. The example continues with subtracting 1x from 15x, resulting in 14x. The video concludes with the final answer and a summary of the process.

What is the first step in adding or subtracting variables?

• Divide the variables

• Multiply the coefficients

• Combine the coefficients

• Combine the variables

In the expression 9x + 6x, what do you combine?

• The variables

• The exponents

• The coefficients

• The constants

If you have 9x and add 6x, what is the new coefficient?

• 6

• 3

• 15

• 9

What does the expression 9x + 6x simplify to?

• 15x

• 21x

• 12x

• 18x

What is the result of combining 9x and 6x?

• 15x

• 12x

• 21x

• 18x

What is the coefficient of x in the expression 9x?

• 1

• 15

• 9

• 6

What remains unchanged when combining coefficients?

• The constant

• The coefficient

• The variable

• The exponent

What is the implicit coefficient of a variable with no number in front?

• 2

• 1

• 0

• 10

How do you represent 'x' in terms of coefficients?

• 10x

• 0x

• 1x

• 2x

What is the coefficient of x in the expression 1x?

• 2

• 0

• 1

• 10