In a certain country, a letter up to 1 ounce requires postage in the amount of $0.42, and each additional ounce (or fraction of an ounce) has an additional cost. the function below represents the cost of mailing one letter in this country. josiah has two letters. the first weighs 2.9 ounces, and the second weighs 4.1 ounces. what is the total amount josiah can expect to pay for postage?

$1.84

Step-by-step explanation:

In a certain country, a letter upto 1 ounce requires postage of = $0.42

and each additional ounce (or fraction of an ounce) has an additional cost.

The function which represents this situation :

The weight of Josiah's first letter = 2.9 ounces (x= 2.9)

f(1) = 0.80

f(2) = 1.04

0.80 + 1.04 = $1.84

The total amount is $1.84, Josiah can expect to pay for postage

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

yes

step-by-step explanation:

yes