Between 9 pm and 6:54 am, the water level in a swimming pool decreased by 9/20in. Assuming that the water level decreased at a constant rate, how much did the water level drop each hour?

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets,x, and the number of student tickets,y. find the solution and explain what it means. i'll you if you me

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?