X -5 y -.25 x 0 y 6 x 5 y 12.25 x 10 y 18.5

4. m=1.25 b=6 y=1.25x+6

5. m=20 b=10 y=20x+10

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: