Determine whether the graph is the graph of a function. 
A. function
B. not a function
Answer: A
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Provide an appropriate response.A pipe tapers 0.75 cm for every 30 cm of length. Use a constant of direct variation to determine the amount of taper of a 145 cm length.
A. 3.625 cm B. 4.83 cm C. 56.25 cm D. 40 cm
Provide an appropriate response.If the expression 49x2 - 9y2 is written in the form a2 - b2, then 
and 
A. a = 7x; b = 3y B. a = 3; b = 7 C. a = 3x; b = 7y D. a = 7; b = 3
Write the exponential equation in logarithmic form.42 = 16
A. log4 2 = 16 B. log4 16 = 2 C. log16 4 = 2 D. log2 16 = 4
?Seven hundred gallons of 89-octane gasoline is obtained by mixing 87-octane gasoline with 92-octane gasoline. How much of each type of gasoline is required to obtain the 700 gallons of 89-octane gasoline? Use this system of linear equations there x and y represent the number of gallons of the 87-octane gasoline and 89-octane gasoline.
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A. 87?-octane: 89 gal; 92-octane: 280 gal ? B. 87?-octane: 280 gal; 92-octane: 420 gal? C. 92??-octane: 89 gal; 87-octane: 280 gal D. ??87-octane: 420 gal; 92-octane: 280 gal E. ??92-octane: 280 gal; 87-octane: 89 gal