Solve the problem.It costs $21 per hour plus a flat fee of $23 for a plumber to make a house call. After writing an equation for this situation, suppose the total cost to have a plumber come to a house is $191. How many hours did the plumber work?
A. 19 hr
B. 20 hr
C. 7 hr
D. 8 hr
Answer: D
Mathematics
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 4 sin t - sin 4t, y = 4 cos t - cos 4t, 0 ? t ? 2?
A. 
B. 
C. 
D. 
Mathematics
Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 60,000 B. 0.06 C. 0.00001667 D. 0.0006
Mathematics
Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m B. 21 + m C. 21 + 7m D. 21 + 3m
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors.log6
A. 5log6x + 8log6y
B. 
log6
C. 5log6x - 8log6y
D. 8log6y - 5log6x
Mathematics