Solve equation by using the quadratic formula.3x2 - 4x = 7
A. x = 
, 1
B. x = 
, -1
C. x = 
, -1
D. x = 
, 0
Answer: C
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Find the probability.Three fair coins are tossed. Find the probability of getting exactly two tails.
A. 
B. 
C. 
D. 
Solve the inequality.
+ 4 > 2
A. b < 2, b > 6 B. b < -6, b > -2 C. -6 < b < -10 D. b < -6, b > -10
If an argument reads
If ?ABC is an equilateral triangle with perimeter 3s units then each edge of ?ABC is s units long. If each edge of an equilateral triangle is s units long then its height is ?3s/2 units. If the height of an equilateral triangle is ?3s/2 units, then its area is ?3s2/4 units2. Then we can deduce (a) If ?ABC is an equilateral triangle with perimeter 3s units then its area is ?3s2/4 units2. (b) If the area of ?A|BC is| ?3s2/4 units2 then it is an equilateral triangle (c) If each edge of an equilateral triangle is s units long then its area is ?3s2/4 units2. (d) All of these are valid conclusions. (e) Both (a) and (c) are correct.
Find the vertices and locate the foci for the hyperbola whose equation is given.
- 
= 1
A. vertices: (-10, 0), (10, 0)
foci: (- 
, 0) , (
, 0)
B. vertices: (-9, 0), (9, 0)
foci: (- 
, 0) , (
, 0)
C. vertices: (-9, 0), (9, 0)
foci: (-10, 0), (10, 0)
D. vertices: (0, -9), (0, 9)
foci: (- 
, 0) , (
, 0)