In a class in which the final course grade depends entirely on the average of four equally weighted 100-point tests, Sarah has scored 86, 85, and 84 on the first three. What range of scores on the fourth test will give Sarah a C for the semester (an average between 70 and 79, inclusive)? Assume that all test scores have a non-negative value. Express your answer in interval notation.

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

The plant were you work has a cylindrical oil tank that is 2.5 feet across on the inside and 10 feet high. the depth of the oil in the tank is 2 feet. about how many gallons of oil are in the tank?

Given that the images represent 4 steps in the construction of a line segment congruent to a given line segment, which is step 3 in the construction?