Which of the following is an irrational number a.18
b.2.66666666666666...
c.
d.-16/3

  c.  π

Step-by-step explanation:

Intgers, fractions, and repeating or finite-length decimals are all rational number.

Pi (π) is an irrational number.

answer: asdfghjkl,mnbv

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -