Number Sense
5.5 - 6.6
-1.1
Jigdal bought 5 packs of gum. He spent 5.50 in total. How much did each pack cost?
(key + equation)
5x = 5.50
Is this a proportional relationship? How do you know?
Distance: Hours:
3 miles 1 hour
5 miles 2 hours
6 miles 2.5 hours
No, not all ratios are constant
What is 40% of 90?
36
NEITHER!
-3 x 10 x -2
60
You bought a magazine for $6 and some notepads for $3 each. You spent a total of $18. How many notepads did you buy?
6 + 3x = 18
How much does one banana cost?
$ # of bananas
3.50 7
7.00 14
4.50 9
$0.50 for 1 banana
I bought a shirt for $35, but there's a 10% tax. How much do I spend?
$38.50
What are the two things that tells you a graph is proportional?
Straight line
through origin
- 16 - 10 + 4
-22
Muazama buys new books from Amazon. The total cost, including $6.50 shipping, was $63.00. Each book cost $5.65. How many books did Muazama buy?
Let x = number of books
63 = 6.50 + 5.65x
Salvador drinks 3 liters of water per day.
How many liters will he drink in 6 days?
18 liters
I guessed that the average on the test would be a 95. It was actually a 100. What was my percent error?
5%
Which expressions are always equal to 3(2x - 2)?
A. 6x - 2
B. 6x - 6
C. 6(x -1)
B and C
(7 + 5) - 6 / 2 + 4 x 3
21
A wise man once said, "400 reduced by 3 times my age is 163." What is his age?
Let x = age
400 - 3x =163
Tsering drinks 3.5 liters of water per day.
How long will it take her to drink 14 liters?
4 days
Lekshey bought Air Conditioners to sell. He then marked up the price by 15%. He sold them for $460. How much did he buy them for?
400
If the product of 5 integers is positive, at most how many of the integers can be negative?
4
absolute value of (4 - 16)
12
Cody's Bikes rents bikes for $18 plus $5 per hour. Mofor paid $48 to rent a bike. For how many hours did he rent the bike?
Let x = # of hours
18 + 5x = 48
I use 16 red beads for every 2 bracelets.
Write an equation that represents the relationship between the number of red beads, r, and number of bracelets, b.
r = 8b
- Sour patch was originally $2.00
- Discount of 10%
- Tax of 5% after discount
$1.89
What is Anna's favorite ice cream flavor?
coffee chip