Write the expression as one logarithm.log2 19 - log2 20
A. log2 
B. log2 -1
C. log2 
D. log4 
Answer: C
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Solve the system by elimination. x - 3y = -8 6x - 4y = 22
A. ? B. {(6, 6)} C. {(7, 5)} D. {(-7, 6)}
Solve.The cost of renting a certain type of car is $40 per day plus $0.10 per mile. A linear function that expresses the cost C of renting a car for one day as a function of the number of miles driven x is 
What are the independent and dependent variables?
A. The independent variable is the number of days, x. The dependent variable is the cost C. B. The independent variable is 40. The dependent variable is 0.10. C. The independent variable is the cost, C. The dependent variable is the number of miles driven, x D. The independent variable is the number of miles driven, x. The dependent variable is the cost C.
Provide an appropriate response.The programmers were working with a graphics file of 406,581,060 bytes. Write this whole number in word form.
A. Four hundred six million, five hundred eighty-one thousand, sixty B. Four hundred six thousand, five hundred eighty-one hundred, sixty C. Four hundred six billion, five hundred eighty-one million, sixty D. Four hundred sixty million, five hundred eighty-one thousand, six hundred
Solve the problem.The battleship USS Tennessee is 70 miles due south of the destroyer USS Alaska and is sailing north at 40 mph. If the USS Alaska is sailing east at 25 mph, how long will it be before the distance between the ships is at a minimum? Express your answer in hours and minutes, rounded to the nearest minute.
A. 41 minutes B. 1 hour 26 minutes C. 2 hours 5 minutes D. 1 hour 15 minutes