Mean
What is the mean (average) of this data set:
4, 6, 2
4
Write this decimal as a fraction:
0.22
22/100 = 11/50
x/7 = 6
x = 42
12 + 7 x 4
40
Determine whether the ratios are proportional: How do you know?
2/7, 6/21
Yes
What is the mean (average) of this data set:
10, 3, 6, 4, 12, 1
6
Write this fraction as a decimal:
3/4
0.75
x/10 = 3
x = 30
(5 + 3) - 2 x 4
0
Determine whether the ratios are proportional: How do you know?
8/24, 6/20
No
125, 3, 8, 7, 56, 18, 14, 8
29.875
Solve:
-3 + y = -5
y = -2
x - 55 = 12
x = 77
9 - 3 x 6 + 8 x 3
32
Find the unit rate:
226 miles on 12 gallons
18.83 gallons
65, 75, 13, 49, 21, 8, 78, 36
43.125
Solve:
4 + (-7) = x
x = -3
x + 12 = 35
x = 23
12 + (8 x 2) - 7 x 1
x = 21
Solve:
0.92/1 = m/3
m = 2.76
5, 14, 5, 23, 5, 9, 5, 19, 2, 5, 31, 5
10.6
Simplify:
5x3 + 3y + 7x3 - 2y - 4x2
12x3 + y - 4x2
x + 48 = 102
x = 54
6 - 2 (3 x 8) + 14 / 7 -1
43
Use cross products to solve each proportion:
4/36 = x/180
x = 20