Jessica has three sports cards, one for football (f), one for baseball (b), and one for soccer (s). she picks one card, replaces it, and then picks another card. the sample space for this compound event is listed.

The answer is 9

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation:

6.5

step-by-step explanation:

you said it was in the question

~courtney