# Algebra 1 1.1

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Category: Education

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## Presentation Transcript

### Slide 1:

Without a Calculator Perform the indicated operation. 3. 11.6 – 5.9 Bell Ringer Warm-Ups

### Slide 3:

Substitute 3 for n. Multiply. = 39 Subtract. = 2 Substitute 3 for n. Substitute 3 for n. = 3 Divide. EXAMPLE 1 Evaluate algebraic expressions Evaluate the expression when n = 3. = c. n – 1 = Substitute 3 for n. Add. = 11 d. n + 8 = 3 – 1 3 + 8

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GUIDED PRACTICE for Example 1 = 12 = 6 = 4 Evaluate the expression when y = 2. 1. 6y 3. y + 4 = 9 4. 11 – y

### Slide 5:

EXAMPLE 2 Evaluate an expression Movies The total cost of seeing a movie at a theater can be represented by the expression a + r where a is the cost (in dollars) of admission and r is the cost (in dollars) of refreshments. Suppose you pay \$7.50 for admission and \$7.25 for refreshments. Find the total cost. Add. Substitute 7.50 for a and 7.25 for r. = 14.75 = 7.50 + 7.25 Write expression. Total cost = a + r

### Slide 6:

EXAMPLE 3 Read and write powers Write the power in words and as a product. seven to the first power a. 71 7 five to the second power, or five squared b. 52 one half to the third power,or one half cubed z to the fifth power d. z5

### Slide 7:

GUIDED PRACTICE for Examples 2 and 3 5. WHAT IF? In Example 2, suppose you go back to the theater with a friend to see an afternoon movie. You pay for both admissions.Your total cost (in dollars) can be represented by the expression 2a. If each admission costs \$4.75, what is your total cost?

### Slide 8:

GUIDED PRACTICE for Examples 2 and 3 Write the power in words and as a product. Nine to the fifth power 6. 95 Two to the eighth power 7. 28 n to the fourth power

### Homework :

Homework Pages 5-7 Skills Practice # 1, 2, 4-14 evens, 15, 16-24 evens, 25, 26-44 evens, 45, 46, 49-54, 57