Integers
Which pair represents additive inverses?
A. -7 and 7
B. -7 and -7
C. 7 and 0
A. -7 and 7
Is the product positive or negative?
(-6)(-4)
positive
A car travels 120 miles in 3 hours.
How many miles per hour?
40 mph
Find 20% of $80.
16
Evaluate:
-18 + 27
9
Find:
15 + (-22)
-7
Evaluate:
(-8)(7)
-56
Complete the table.
Bottles Cost
4 6
8 _____
12 _____
16 _____
12, 18, 24
A jacket costs $50 and is 30% off.
What is the discount?
Evaluate:
(-5)(-12)
Use absolute value to explain:
-18 + 6
The difference in the absolute values is _____.
12
Which expressions will result in a negative quotient?
Is the relationship proportional? If so, please explain how you know.
X Y
2 8
4 16
6 24
Yes. The unit rate is constant. The constant of proportionality is 4.
A jacket costs $50 and is 30% off.
What is the sales price?
$35
A runner travels 18 miles in 3 hours.
Find the unit rate.
6 mph
What number sentence matches this movement?
Start at -3 and move down 5 units.
A. -3 + 5 = 2
B. -3 + (-5) = -8
C. -8 + 5 = -3
B. -3 + (-5) = -8
Evaluate:
a ÷ b
if a = -180 and b = 12
-15
Write an equation relating total cost y to number of notebooks x.
5 notebooks cost $12.50.
A bicycle was priced at $400 and sold for $320.
Find the percent decrease.
20%
Six energy drinks cost $9.
Write an equation relating cost y to the number of drinks x.
y=1.5x
A bank account starts at $250. A withdrawal of $85 and another withdrawal of $40 are made.
What is the new balance?
$125
Evaluate:
(-3)(-8) + (-12)
12
A salesperson earns 4% commission.
What amount must be sold to earn $1,200?
$30,000
A gaming console costs $250. The price increases by 15%.
What is the new price?
$287.50
A scooter was originally priced at $120 and sold for $84.
Find the percent decrease.
30%