Perform the indicated operations and simplify. Assume all variables represent positive real numbers.
- 6
+ 4
A. -2x
B. -2x
C. -9x
D. -9x
Answer: D
Mathematics
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Solve.Two plumbers make house calls. One charges $90 for a visit plus $40 per hour of work. The other charges $70 per visit plus $50 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 2.5 hr C. 1.5 hr D. 1 hr
Mathematics
Solve the problem.Two cards are drawn in order from a well shuffled deck of 52 cards. The probability that both cards are 10's is given by
A. 
× 
.
B. 
× 
.
C. 
12.
D. 
× 
.
E. none of these
Mathematics
Simplify each side of the equation, if possible. Then solve the equation.33 = x + 65
A. 7749 B. -7803 C. -7749 D. 7803
Mathematics
Factor completely. If the polynomial is prime, so state.3x3 + 17x2 + 20x
A. x(3x + 4)(x + 5) B. x(x + 4)(3x + 5) C. 3x(x + 4)(x + 5) D. prime
Mathematics