Carson is draining his swimming pool so he can clean it. the water level started at 12 feet and decreased 6 inches every hour. which of the following equations provides the water level of the swimming pool (in feet ) as a function of time (in hours)?

a. y= -1/2x+12
b. y= 6x-12
c. y= -6x+12
d. 1/2x-12

Select all the correct statements. the amount in dollars an electrician charges in terms of the number of hours worked is represented by the function y = 22x + 42. from the function, identify all the phrases that hold true for the situation. the electrician charges an initial fee of $22 the y-variable represents the number of hours the electrician charges an initial fee of $42 the electrician charges $22 for every hour worked the x-variable represents the electricians charges in dollars the electrician charges $42 for every hour worked

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?