Numbers System
15−(−6)
21
Find the unit rate: 24 cookies in 6 boxes
4 cookies per box
Write an expression for “3 times a number n”
3n
C=2πr
Find the circumference if r=3
18.84
True or False: A sample should represent the population
True
−15+10
-5
Write the ratio of 6 red marbles to 3 blue marbles in simplestt form
2:1
5x−2x
3x
What is the diameter if the radius is 5?
10
Drawing names from a hat is what type of sampling?
Random
(−8)(−6)
48
Solve: 5/8 = x/24
15
3x+4=10
x=2
Supplementary angles add to what number?
180°
Find the median: 3, 7, 9, 11, 13
9
−36÷6
-6
If y=4x, what is y when x=5?
20
1/2x + 2 = 6
x=2
A=1/2 bh
Find area of triangle: base 6, height 4
12
Which has more variability: 2,2,2 or 1,5,9?
1,5,9
A bank account drops $20, then increases $8. What is the total change?
-12
A shirt costs $20 and is 50% off. What is the discount?
$10
3 times a number plus 2 equals 11. What is the number?
3
Find volume.
Length: 5cm Width: 2cm Height: 3cm
30cm
If an event is certain, its probability is…
1