A: 30/6 = 6/1
B: 30/45 = 10/15
C: 32/8 = 20/4
Which two fractions are equivalent?

b. 30/45 = 10/15; reduce by 3

Step-by-step explanation:

a. 30/6 = 5 not 6 so no

c. 32/8 = 4. even if you reduced by 2, it would be 16/4 so no

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons