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
Answer: A
Mathematics
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Use the substitution formula to evaluate the integral.
A. 
B. - 
C. 13
D. 26
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Factor completely. Make sure you factor out the GCF first if possible. If prime, so state.49x2 + 126x + 81
A. (7x - 9)2 B. (7x + 9)(7x - 9) C. (49x + 1)(x + 81) D. (7x + 9)2
Mathematics
Solve the exponential equation. Leave the answer in exact form. Do not approximate.75x - 2 = 12
A. x = 
- log 2
B. x = log 12 - 5 log 7 + log 2
C. x = 
D. x = 
Mathematics
Determine whether y ? ? or y ? -? as x ? -? and x ? ?.y = x3 - x4 + 4x2 - 2x + 8
A. y ? -? as x ? -?; y ? ? as x ? ? B. y ? ? as x ? -?; y ? -? as x ? ? C. y ? -? as x ? -?; y ? -? as x ? ? D. y ? ? as x ? -?; y ? ? as x ? ?
Mathematics