Evaluate an Expression Using Substitution

What is the first step in evaluating the expression 15 - 3 * B when B is given a specific value?

• Divide 15 by B

• Multiply 3 by B

• Subtract 3 from 15

• Add 15 and 3

If B equals 4, what is the result of substituting B into the expression 15 - 3 * B?

• 15 * 3 - 4

• 15 / 3 * 4

• 15 + 3 * 4

• 15 - 3 * 4

After substituting B with 4 in the expression 15 - 3 * B, what is the next operation to perform?

• Divide 15 by 12

• Multiply 15 by 12

• Subtract 12 from 15

• Add 15 and 12

What is the final result of the expression 15 - 3 * 4?

• 3

• 7

• 15

• 12

What is the main concept demonstrated in this lesson?

• Solving quadratic equations

• Evaluating expressions using substitution

• Finding the derivative of a function

• Graphing linear equations