2. (2x + 3)2
a.4x2 + 9
b.4x2 + 12x + 9
c.4x2 + 6x + 9
d.4x2 + 6
3. Calculate the following: 3P2
a.5
b.6
c.3
d.2
4. What type of sequence is 30, 15, 7.5, 3.75?
a.arithmetic
b.geometric
c.neither
d.both
5. What is the common difference of the sequence 5, 7, 9, 11, 13?
a.2
b.-2
c.1/2
d.-1/2
2007-05-31 16:55:17 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
"Good at Algebra"? I placed first in my state on the Algebra II Test of Scholastic Achievement... almost 30 years ago. Does that count?
2. b, presuming the "2" means "squared".
(2x+3)(2x+3) =
(2x)(2x) + (2x)(3) + (3)(2x) + (3)(3) =
4x^2 + 6x + 6x + 9 =
4x^2 + 12x + 9
3. b.
3P2 = pick two out of three. The first pick has three possibilities, and the second pick has two (remaining) possibilities. 3*2 = 6. (This is tough, because 3C2 -- "combinations for 2 of 3" -- is 3. In "pick" the ordering of the picks matters -- picking A then B is counted separately from picking B then A -- and in "combinations" it does not.)
4. b.
A geometric series is one that has the same ratio between any pair of adjacent terms. In this case the ratio is 1/2 (each subsequent term is one-half the previous).
5. a.
Each term is 2 greater than the previous. If each term were 2 *smaller* it would be -2.
2007-05-31 16:58:26 · answer #1 · answered by McFate 7 · 0⤊ 0⤋
7
2007-06-01 00:00:19 · answer #2 · answered by Just_One_Man's_Opinion 5 · 0⤊ 0⤋
#2
(2x+3)^2
(2x+3)(2x+3) you have to FOIL
4x^2+6x+6x+9 combine like terms
4x^2+12x+9
answer is b
#5
the answer is a
because it goes by 2
2007-06-01 00:33:21 · answer #3 · answered by Jeannie M 1 · 0⤊ 0⤋
Answers
2)b
3)c
4)b
5)a
2007-06-01 00:02:38 · answer #4 · answered by Anonymous · 0⤊ 0⤋
2. b
4. b
5. a
2007-06-01 00:08:47 · answer #5 · answered by ExtraordinarY 2 · 0⤊ 0⤋
I am
2007-06-01 00:31:24 · answer #6 · answered by Idyllic 3 · 0⤊ 0⤋