Cameron surveyed her friends about the number of apps they use. The responses were 15,16,18,9,18,4,19,20,17,and 36 apps. Use the range and the interquartile range to describe how the data vary.

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:

0 is its x and y coordinate

9

step-by-step explanation: