Answer:
r=-6
Step-by-step explanation:

Answer:
64
Step-by-step explanation:
8 times 8 is 64, but it is the opposite of positive is negative
Answer:
(2b, 2b + 7).
Step-by-step explanation:
y = x + 7 and x = 2b ,
therefore y = 2b + 7.
Answer:
33
Step-by-step explanation:
33 is odd, so cannot be a multiple of an even number.