Question

to mail a first class letter, the u.s. postal service changes $50 for the first ounce and $21 for each additional ounce. it costs $1.34 to mail your letter. how many ounces does your letter weigh

Answer 1

There clearly is a typo in the answer: I assume the price for the first ounce is 0.50$, and then you pay 0.21$ for each additional ounce.

So, the price of a letter is
`0.50 + 0.21a`

where
`a` is the number of additional ounces.

If you paid 1.34$, the equation is

`1.34=0.50 + 0.21a \iff 0.21a = 0.84 \iff a = (0.84)/(0.21) = 4`

So, your letter weights 4 additional ounces.

Answer 2

about 1 ounce because total it would be 2.05 dollars so not even an ounce.

o i do not know the answer, but i know its not even an ounce.