The Number System
Add: -7 + 9 + (-18)
-16
Simplify: 4x + 3 - 2x + 5
2x + 8
What is the area of a rectangle with length 6 and width 4?
24.
What is the mean of 4, 6, 8?
6.
A map has a scale of 1 inch = 50 miles. How many miles are represented by 4.5 inches?
225 miles
Multiply: –3.5 × 2.4
-8.4
Write an inequality: “A number x is less than equal to 2 times 10.”
Answer on the board.
Find the perimeter of a square with side 5.
20.
What is the mode of 3, 3, 5, 6, 7?
3.
A recipe uses 2 cups of flour for every 5 cookies. How many cups for 20 cookies?
8 cups of flour.
A diver descends 6.5 meters below sea level each minute. How deep after 7.2 minutes?
46.8 meters.
Solve: 2 (x-3) = 10
x = 8
Describe what area and perimeter of a shape mean. Give example.
Answer varies.
What does the median represent? Give example.
Answer varies.
You buy 3 shirts for $27. What's the cost per shirt?
Divide: 3/4 ÷ 1/2
3/2
What is the value of 4x + 9(y + z) + 3, when x = 4, y = 7, and z = 1?
91.
A triangle has a base of 6 and a height of 4. What is the area?
12
Create a data set of 5 numbers with a mean of 10 and a range of 6.
Example: : 7, 9, 10, 11, 13
If a person runs 2.5 miles in 20 minutes, what is their pace in minutes per mile?
8 minutes per mile.
Divide: 1 ¾ ÷ ½
7/2
A rectangle has length (2x + 1) and width (x – 2). Write an expression for its area.
(2x + 1) (x - 2)
A triangle has area of 36 cm2 and height of 9 cm. Find the base.
8 cm.
Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?
66
A toy costs $15. Tax is 8.5%. What is the total cost including tax?
$16.275