Which of the following represents the value of the series below? (see pic)

a) s28=28(5+248/2)
b) s28=9(28)-4+(9(1)-4)
c) 28(5+248)
d) (248-5/2)

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0