Solve the problem.A driver wants to gauge the fuel efficiency of her vehicle at speeds of 30 mph and above. She notices that traveling at an average speed of 30 mph results in a rating of 36 mpg, where as at an average speed of 40 mph, her car rates 31 mpg. Find an equation to model the gas mileage y for an average speed of x mph.
A. y = 2x + 51
B. y = - 
x + 51
C. y = - 
x - 21
D. y = 2x - 21
Answer: B
Mathematics
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Express the given function as a composite of functions f and g such that y = f(g(x)).y = 
A. f(x) = 
, g(x) = 5x + 4
B. f(x) = 
, g(x) = 6
C. f(x) = 
, g(x) = 5x + 4
D. f(x) = 6, g(x) = 
Mathematics
Find the sum, if it exists.0.02 + 0.002 + 0.0002 + 0.00002 + . . .
A. 
B. 0
C. 
D. Does not exist
Mathematics
Graph the equation.x = 1
A. 
B. 
C. 
D. 
Mathematics
Determine whether the relation is a function. Give the domain and range.{(9, 6), (-8, -8), (6, 5), (1, -8), (-8, 6)}
A. function; domain: {-8, 5, 6}; range: {-8, 1, 6, 9} B. not a function; domain: {-8, 1, 6, 9}; range: {-8, 5, 6}
Mathematics