Arectangle has sides measuring (4x + 5) units and (3x + 10) units.

part a: what is the expression that represents the area of the rectangle? show your work to receive full credit.

part b: what are the degree and classification of the expression obtained in part a?

part c: how does part a demonstrate the closure property for polynomials?

i got a and b i just need with c

part a: area equals length times width
equals (4x + 5)(3x + 10) equals 12x^2 + 55x + 50

part b: the degree is 2, it's a quadratic expression.

Which answer is the solution set to the inequality |x|< 9? a. x< -9 or x> 9 b. x> -9 and x< 9 c. x> -9 or x< 9 d. x< 9 and x< 9

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?