Central Tendency
Mean of 7, 10, 12, 11
(7+10+12+11)/4
40/4
= 10
Simplify 4x+3x.
4x + 3x = 7x
Simplify (x2) * (x3)
x2 + 3
=x5
Factor x2+5x+6
(x+2)(x+3)
Simplify (6x/3)
2x
Median of 6, 15, 8, 19, 10
(sorted: 6, 8, 10, 15, 19) = 10
Add 2a2 + 3a and a2 + 5a
2a2 + 3a + a2 + 5a
= 3a2 + 8a
Simplify (y5 / y2)
y5-2
=y3
Factor a2-9
Simplify (x2-9) /(x+3)
x-3
Mean of 19, 20, 17, 9
(19+20+17+9)/4
=16.25
subtract 7x+4 from 10x+2
10x+2 -7x-4
= 3x-2
What is (a3)2?
a6
Expand (x+3)2
x2+6x+9
Peform (2/x) + (3/x)
5/x
Which measure of central tendency would be best for the set: 1, 1, 1, 30?
mode
simplify (2m +6) - (7m-2)
2m+6-7m+2
=-5m +8
Simplify (2x2)3
(2)3(x2)3
= 2x2x2
=8x6
Factor 2x2 +8x
2x(x+4)
Simplify (3x/9x2)
1/3x
Mode of 3, 5, 5, 8, 10
5
What is 5y -2y +9?
5y -2y +9
= 3y +9
What is 24
2 x 2 x 2x 2
=16
Expand (x+4)(x-2)
x2+2x-8
Subtract (x+5)/3 to (2x-3)/6
13/6