Idon't understnad this .
*d • r = r • d ? ?
a.)commutative property of multiplication
b.)identity property of multiplication
c.)zero property of multiplication
d.)commutative property of addition

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.