Use the formula for the sum of the first n terms of a geometric sequence to solve.Find the sum of the first 11 terms of the geometric sequence: 
, 1, 2, 4, 8, . . . .
A. 
B. 
C. 1027
D. 
Answer: D
Mathematics
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Complete the exercises using counting techniques. A restaurant offers a salad lunch special. If you can choose one of 3 types of dressings and one of 4 different toppings, how many different salads are possible?
A. 7 B. 9 C. 12 D. 16
Mathematics
Add or subtract. Write the answer in lowest terms.
- 
A. 
B. 
C. 
D. 
Mathematics
Simplify.If P(x) = -9x + 2 and Q(x) = 3x2 + 6x + 6, find P(x) - Q(x).
A. -3x2 - 15x + 4 B. 3x2 - 15x - 4 C. -3x2 + 15x - 4 D. -3x2 - 15x - 4
Mathematics
Use the factoring method to identify the LCD for the pair of fractions.
, 
, 
A. 108 B. 270 C. 180 D. 540
Mathematics