Five friends share the cost of a dinner equally. a. Let x represent the total cost of the dinner. Write an expression for the cost per person.

Expression:

b. If the total cost is $30, use your expression to determine the cost per person.

Cost per person: $

30/5=6

Step-by-step explanation:

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:

c

step-by-step explanation: