Answer:
V≈268.08cm³
Step-by-step explanation:
X = number of cds on the rack
x + 7 = 30
x = 30 - 7
x = 23 <== so there are currently 23 cds on the rack
2n=14 n being the “number” divide 2 on both sides and you’re left w n=14/2 or7
B is true because 0-(-x) = 0 + x = x