Evaluate Expressions Evaluate x – y + 6 if x = 27 and y = 12. x – y + 6 = 27 – 12 + 6Replace x with 27 and y with 12. Answer: 21 = 15 + 6Subtract 12 from.

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Presentation transcript:

Evaluate Expressions Evaluate x – y + 6 if x = 27 and y = 12. x – y + 6 = 27 – Replace x with 27 and y with 12. Answer: 21 = Subtract 12 from 27. = 21Add 15 and 6.

A.30 B.16 C.8 D.20 Evaluate 12 + a – b if a = 7 and b = 11.

Evaluate Expressions A. Evaluate 6y – 4x if x = 3, y = 4, and z = 7. Answer: 12 6y – 4x = 6(4) – 4(3)Replace y with 4 and x with 3. = 24 – 12Multiply. = 12Subtract.

Evaluate Expressions Answer: 1 B. Evaluate if x = 3, y = 4, and z = 7.

C. Evaluate 5z + (x + 4y) –15 if x = 3, y = 4, and z = 7 = 5(7) + (3 + 16) – 15 Multiply 4 and 4. = 5(7) + 19 – 15 Add 3 and 16. 5(7) + ( ) – 15 Replace z with 7, x with 3, and y with 4. = – 15 Multiply 5 and 7. Answer: 39 = 54 – 15 Add 35 and 19. = 39 Subtract 15 from 54.

Evaluate Expressions

A.3 B.13 C.22 D.28 A. Evaluate 5p – 3m if m = 9, n = 4, and p = 6.

B. Evaluate if m = 9, n = 4, and p = 6. A.4 B. C. D.6

C. Evaluate p + (8n – 3m) if m = 9, n = 4, and p = 6. A.23 B.15 C.14 D.11

Translate Verbal Phrases into Expressions A. Translate the phrase 35 more than the number of tickets sold into an algebraic expression. 35+t B. Translate the phrase the difference of six times a number and ten into an algebraic expression. Answer: The expression is 6n – 10. the difference of six times a number and ten – 6n10

A.c – 8 B.8 – c C.–8 – c D.–c – 8 A. Translate the phrase eight less than the number of cookies baked into an algebraic expression.

A.12(5 + n) B n C n D.17n B. Translate the phrase the sum of twelve and five times a number into an algebraic expression.

A B.( )hp C.h + p D.9.5h + 4.5p A. RETAIL The Read It Bookstore is advertising a sale. The price of hardback books is $9.50 and the price of paperback books is $4.50. Write an expression that can be used to find the total amount of money spent at the bookstore.

A.$85.50 B.$65.50 C.$60.50 D.$ B. RETAIL The Read It Bookstore is advertising a sale. The price of hardback books is $9.50 and the price of paperback books is $4.50. Suppose Emily buys 5 hardback books and 4 paperback books. Find the total amount she spent at the book sale. 9.5h + 4.5p