A truck gets 400/x mpg when driven at a constant speed of x mph (between 40 and 70 mph). If the price of fuel is $1/gallon and the driver is paid $6/hour, at what speed between 40 and 70 mph is it most economical to drive? Round your answer to the nearest whole number.
?
__________ mph
Fill in the blank(s) with the appropriate word(s).
49
Mathematics
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Provide an appropriate response.Add: 395 + 76 + 6,375 + 5
A. 11,846 B. 22,925 C. 5,825 D. 6,851 E. none of the above
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Solve the problem.A pair of ropes needs adjustment. One rope is 80 inches and the other is 50
inches. Find how much the longer rope should be shortened to make both ropes the same length.
A. 30
in.
B. 14
in.
C. 130
in.
D. 29
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Let A = {6, 4, 1, {3, 0, 8}, {9}}. Determine whether the statement is true or false.{3, 0, 8} ? A
A. True B. False
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Answer the question.If the graphs of a system of two equations are both circles, what are the possible numbers of solutions (with real coordinates) of this system?
What will be an ideal response?
Mathematics