Which of the following is a valid use of the associative property of addition?
A. (23 + 15) – 5 = 23+ (15 – 5)
B. (23 – 15) + 5 = 23 – (15 + 5)

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

Asphere has a diameter of 10 in. what is the volume of the sphere?