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Composition book out. Warm-up What is your goal for this week in math?. Warm-up. Kristen wants to buy a new TV for $1200. She has saved $623.59 for her purchase. How much more does she need to save to buy the TV? Answer: $576.41. 1.1 Variables & Expressions.

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Composition book out
Composition book out

Warm-up

What is your goal for this week in math?


Warm up

Warm-up

Kristen wants to buy a new TV for $1200. She has saved $623.59 for her purchase. How much more does she need to save to buy the TV?

Answer: $576.41


1 1 variables expressions
1.1 Variables & Expressions

  • Variable: a letter that represents a value that can change or vary

  • Coefficient: the number multiplied by the variable

  • Constant: a number that does not change

    30n + 6

  • Evaluate: to find the answer

  • Substitute: to replace a number for a variable


Evaluating expressions
Evaluating expressions

  • Substitute the number for the variable & solve

    X + 6 for x = 13

    13 + 6

    19

    2x + 3y for x = 15 and y = 12

    2(15) + 3(12)

    30 + 36

    66



Translating word phrases into algebraic expressions
Translating word phrases into algebraic expressions

A number n decreased by 11

n – 11

Quotient of 3 and a number x

3/x

1 more than the product of 12 and p

1 + 12p

3 times the sum of x and 1

3(x +1)


Joke of the day

Joke of the Day

A three-year-old had been told several times to get ready for bed. The last time his mom told him, she was every insistent. His response was, "Yes, Sir!" Since he was talking to his mother (and she is a woman), it was not expected of him to call her "Sir"."You would say, 'yes sir,' to a man, I am a lady, and you would say 'Yes Ma'am,' to a lady," Mom said. To quiz him on is lesson; she then asked him, "What would you say to Daddy?""Yes Sir!" was the reply"Then what would you say to Mama?""Yes, Ma'am!" he proudly answered."Good boy! Now what would you say to Grandma?"He lit up and said,

"Can I have a cookie?"



Write an expression then evaluate
Write an expression & then evaluate

  • Monica got a 200 minute calling card & called her brother at college. After talking with him for t minutes, she had t less than 200 minutes remaining on her card. Write an expression to determine the number of minutes remaining on the calling card.

    200 – t

  • If Monica talked with her brother for 55 minutes, how many minutes does he have left on her calling card?

    200- t

    200- 55

    145

    She has 145 minutes left on her calling card.


Workbook out
Workbook out

  • Turn to pg. 1

  • Do #1 & check your answer w/your table

  • Let’s look at #15

  • Finish #16-18 with your table.

  • Turn to pg. 2

  • Let’s look at #7


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