Answer:
(x^3)-(5x^2)-9x+45
Explanation:
(x-3)(x+3)(x-5)
(x^2-9)(x-5)
(x^3)-(5x^2)-9x+45
Answer:
21 minutes
Step-by-step explanation:
Her expected commute time is given by the probability of having to wait for the train (0.2) multiplied by the commute time in this scenario (25 min), added to the probability of not having to wait for the train (1 - 0.2) multiplied by the commute time in this scenario (20 min). The expected commute time is:

Her expected commute time is 21 minutes.
The area of a trapezoid is A = (a+b/2)(h).
So just plug in your numbers.
Answer:
I would say 1 lbs of dog food is equivalent to 4 4/7 meals.
7/8 lbs : 4 meal = 1 lbs : x meals 1 lbs = 8/8 lbs perform cross 7/8 lbs (x) = 8/8 * 4 7x/8 = 8*4 / 8*1 7x/8 = 32/8 7x/8 = 4 8(7x/8) = 8*4 7x = 32 7x/7 = 32/7 x = 4 4/7 meals to 7/8 : 4 = 1 : 4 4/7 7/8 * 32/7 = 4 * 1 224/56 = 4 4 = 4