1. Assignment:
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2. Lesson 38 Warm­Up:
1) Solve: 6/10 = x/15
2) Collect like terms:
x2 + x + 1 + 3x + x2 + 2
3) At the zoo, the ratio of spotted cats to striped cats was 2 to 5. If
there were 12 spotted cats, how many striped cats were there?
4) The number ­1/2 is a member of which sets of numbers? [list all!]
5) Simplify: 10 + 10(102 ­ 10 32)
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3. Lesson 38
*FYI...To solve equations ­ we must
"ISOLATE THE VARIABLE"
*Also, Remember...
Inverse Operations ­> Add ­ Subtract
Multiply ­ Divide
AND....we "undo" the add/subract BEFORE "undoing" the multiply/divide!!
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4. Examples ­ Lesson 38
A) Which operation is the inverse of subtraction?
B) Which operation is the inverse of multiplication?
Solve each equation. Show all steps!
C) x + 1/2 = 3/4
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5. D) x ­ 1.3 = 4.2
E) 1.2 = x/4
F) 3/5 x = 1/4
G) 5x = $4.50
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