1. Evaluation Solving Equations by Inspection
Lesson 14 Power Up C Page 92

2. Vocabulary
Equation: states two quantities are equal, has an = sign Variable: letter(s) in an equation Constant: number in an equation, doesn’t change Evaluate: Substitute numbers for variables & solve Solution: the number for a variable that makes the equation true.

3. Parts of an Equation
Constant
3 ×𝑛=15
Variable
Equation

4. Examples
a. A formula for the area (A) of a parallelogram is A = bh. Find the area of a parallelogram with a base (b) of 12 in. and a height (h) of 4 in.
b. In the expression 4ac, what is the constant? c. Evaluate 4ac for a = 1 and c = 12.

5. Examples
j. 2𝑎 −1=9 k. 20=3𝑓 −1
l. Admission to the county fair is $3. Each ride costs $2. Nate has $15. Solve the following equation to find how many rides he can take. 2𝑟+3=15