Solve the problem.When going more than 38 miles per hour, the gas mileage of a certain car fits the model 
where x is the speed of the car in miles per hour and y is the miles per gallon of gasoline. Based on this model, at what speed will the car average 15 miles per gallon? (Round to nearest whole number.)
A. 73 mph
B. 98 mph
C. 149 mph
D. 48 mph
Answer: A
Mathematics
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Choose the most reasonable measurement.Tyrell read the nutrition label on the back of his frozen dinner. Choose the most reasonable estimate for the amount of sodium in the dinner.
A. 510 t B. 510 mg C. 510 kg D. 510 g
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Simplify the radical.
A. -4 B. 4 C. 16 D. not a real number
Mathematics
Determine if the given ordered triple is a solution of the system.(1, -3, 3)2x + 4y + z = -54x - 3y - z = 204x + y + 3z = 12
A. not a solution B. solution
Mathematics
Multiply and write the result in standard form.(6 + 9i)(2 + 6i)
A. 54i2 + 54i + 12 B. -42 - 54i C. -42 + 54i D. 66 - 18i
Mathematics