The sequence is defined recursively. Write the first four terms.a1 = -10; an = 
A. a1 = -10, a2 = - 5, a3 = - 
, a4 = - 
B. a1 = -10, a2 = -10, a3 = - 
, a4 = - 
C. a1 = -10, a2 = -10, a3 = - 5, a4 = - 
D. a1 = -10, a2 = - 
, a3 = - 
, a4 = - 
Answer: D
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Solve the problem.7 times the square root of some number is equal to 21. Find the number.
A. 14 B. 6 C. 3 D. 9
Solve the problem.To remodel a bathroom, a contractor charges $25 per hour plus material costs, which amount to $3550. Therefore, the total cost to remodel the bathroom is given by 
where x is the number of hours the contractor works. Find 
What does 
compute?
A. f -1(x) = 
- 3550; This computes the total cost if the contractor works x hours.
B. f -1(x) = 
- 3550; This computes the number of hours worked if the total cost is x dollars.
C. f -1(x) = 
- 142; This computes the total cost if the contractor works x hours.
D. f -1(x) = 
- 142; This computes the number of hours worked if the total cost is x dollars.
Solve the equation for y.6x - 4y = 9
A. y = 
, or y = 
B. y = 
, or y = 
C. y = 
, or y = 
D. y = 
, or y = 
Determine if the following is an identity.
= 
A. Identity B. Not an identity