Answer:
Yes. I think you are right.
Step-by-step explanation:
Yes, its about proving that all prime numbers are on a certain line in a four dimensional landscape. It's eluded Mathematicians for many decades now.
An interesting book about this is 'The Music of the Primes'.
d
$31
You have to do 6.5*4 first since 4 is the number of hours. With that, you will get 26. After that, you need to add a 5 since 5 is the flat fee. At the end, you will get $31.
i think that it is the third one
2x=y