Simplify the expression. (Remember the order of operations.)-8 + 2 - 17
A. -23
B. 23
C. 11
D. 7
Answer: A
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Solve the system. If the system has infinitely many solutions, write the solution set with x arbitrary. x + y - 2z - 8 = 03x + z + 6 = 02x - y + 3z + 14 = 0
A. {(x, 7x + 4, -3x - 6)} B. {(x, 7x - 4, -3x - 6)} C. {(x, -7x + 4, -3x - 6)} D. {(x, -7x - 4, -3x - 6)}
Solve the problem.To remodel a bathroom, a contractor charges $30 per hour plus material costs, which amount to $4200. Therefore, the total cost to remodel the bathroom is given by 
where x is the number of hours the contractor works. Find a formula for 
What does 
compute?
A. f -1(x) = 
- 4200; This computes the total cost if the contractor works x hours.
B. f -1(x) = 
- 140; This computes the total cost if the contractor works x hours.
C. f -1(x) = 
- 140; This computes the number of hours worked if the total cost is x dollars.
D. f -1(x) = 
- 4200; This computes the number of hours worked if the total cost is x dollars.
Solve and check.
- 2 = 
A. -6 B. 36 C. -36 D. No solution
By definition, an "and" statement is true only when the statements before and after the "and" connective are both true. Use this definition to determine whether the given statement is true or false.Three times the sum of a number and eight is represented by 
and 
A. True B. False