notes over 2.5 rules for multiplying negative numbers. if there is an even number of negative...
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Notes Over 2.5Rules for Multiplying Negative Numbers.
If there is an even number of negative numbers, then the answer is Positive.
If there is an odd number of negative numbers, then the answer is Negative.
32 .1 6
17 .2 7
210 .3 20
35.012 .4 18
524 .5 40
266 .6 72
Notes Over 2.5Simplify the variable expression.
w5 .7 5w
tt 8 .88 2t
yy 7 .9
7 2y
x63
1 .10
2x
aaa 4.11
4 3a
ss 105
3.12
6 2s1
2
Notes Over 2.5Evaluate the expression.
13 3. 15 when x x 315
45
14 2 3 12. when p p p
1312 2
52 3
Notes Over 2.5Evaluate the expression.
15 4 5 22. when m m m
2524 2
2616 33. when k k
33
27 333
16 10
Notes Over 2.5Using Multiplication in Real Life.
256 384
17. To promote its grand opening, a record store advertises compact discs for $10. The store loses $1.50 on each compact disc it sells. How much money will it lose on its grand opening sale if it sells 256 discs?
Verbal Model
Number of discs sold
Loss per disc
Total loss
50.1
The store loses $384 on its grand opening.
Notes Over 2.5Using Multiplication in Real Life.
185 462 5.
18. To promote its grand opening, a record store advertises compact discs for $10. The store loses $1.50 on each compact disc it sells. How much money will it lose on its grand opening sale if it sells 256 discs?
Verbal Model
Number of discs sold
Loss per disc
Total loss
50.2
The store loses $462.50 on its grand opening.
18. To promote its grand opening, a record store advertises compact discs for $10. The store loses $2.50 on each compact disc it sells. How much money will it lose on its grand opening sale if it sells 185 discs?
Notes Over 2.5