Peter decides to mix grades of gasoline in his truck. he puts in 11 gallons of regular and 7 gallons of premium for a total cost of $76.99. if premium gasoline costs $0.25 more per gallon than regular, what was the price of each grade of gasoline?

Part of the total score for each program is the sum of five program component scores. on the free program, the sum of these five program component scores is multiplied by a factor of 2.0. yuzuru hanyu, of japan, earned scores of 9.07, 8.96, 8.89, 9.21, and 9.36 for the program components portion of his free program. how many total points did he receive for this portion?

Answer this 30 points and brainliest!

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?