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Assignment:

1-->Set 50 (evens) - Due Tomorrow (1/25)
2-->Inv. #5, #11-14 (all) - Due Tomorrow (1/25)
3-->Test signed??




                                                  1
Lesson 50 Warm-Up:

1)   Solve:   x       1.2
              3

2)   Simplify:    5(x + 3) - 2(x + 4)

3)   Find 1/2mv2, when m = 8 and v = 2

4) In a bag of 60 marbles, 18 are green. What is the
probability of NOT drawing a green one?

5) Annie has answered 21 of the 25 questions. What percent
of the questions has she answered?




                                                             2
Lesson 50:

FYI - REMEMBER...to solve equations we must:
        "ISOLATE THE VARIABLE"

So...sometimes we must do multi-step equations....
        HOWEVER, we must "undo" the adding/subtracting...
            BEFORE we "undo" the multiplying/dividing.
                (opposite of Order of Operations)




                                                            3
Examples (Lesson 50):
Solve--show all steps. Check your answer.
A) 3x + 5 = 50           check:




B) 4x - 12 = 60         check:




                                            4
C) 30n + 22 = 292   check:




D) x/5 + 4 = 13     check:




                             5
E) -2x + 17 = 3     check:




F) 3m - 1.5 = 4.2   check:




                             6
G) 4x + 10 + x = 100   check:




H) 7x - 12 - x = 24    check:




                                7

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7th PreAlg - L50--Jan24

  • 1. Assignment: 1-->Set 50 (evens) - Due Tomorrow (1/25) 2-->Inv. #5, #11-14 (all) - Due Tomorrow (1/25) 3-->Test signed?? 1
  • 2. Lesson 50 Warm-Up: 1) Solve: x 1.2 3 2) Simplify: 5(x + 3) - 2(x + 4) 3) Find 1/2mv2, when m = 8 and v = 2 4) In a bag of 60 marbles, 18 are green. What is the probability of NOT drawing a green one? 5) Annie has answered 21 of the 25 questions. What percent of the questions has she answered? 2
  • 3. Lesson 50: FYI - REMEMBER...to solve equations we must: "ISOLATE THE VARIABLE" So...sometimes we must do multi-step equations.... HOWEVER, we must "undo" the adding/subtracting... BEFORE we "undo" the multiplying/dividing. (opposite of Order of Operations) 3
  • 4. Examples (Lesson 50): Solve--show all steps. Check your answer. A) 3x + 5 = 50 check: B) 4x - 12 = 60 check: 4
  • 5. C) 30n + 22 = 292 check: D) x/5 + 4 = 13 check: 5
  • 6. E) -2x + 17 = 3 check: F) 3m - 1.5 = 4.2 check: 6
  • 7. G) 4x + 10 + x = 100 check: H) 7x - 12 - x = 24 check: 7