Explain why 221 and 391 cannot be prime numbers

because the product of a two non-necessarily distinct prime numbers

Step-by-step explanation:

would have been required that 221 has only two divisors. i.e., itself and 1. However, 221 is a semiprime (also called biprime or 2-almost-prime)

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce