Question

The cost to mail a package is $7 for the first 2 pounds and 30 cents for each additional ounce.

Which of the following functions represents the cost to mail a package if x is the number of ounces over 2 pounds?

ƒ(x ) = 7 + 0.3x
ƒ(x ) = 14 + 0.3x
ƒ(x ) = 0.3(x + 2)

Answer 1

The cost to mail a 2-lb package is $7.

The cost to mail a 2-lb, 1 oz package is $7+$0.30(1).

That to mail a 2-lb, 2 oz package is $7+$0.30(2) = $7.60.

Following this pattern, the general formula is f(x) = $7 + $0.30x, where x represents the number of ounces OVER 2 lb.

Answer 2

the first one

Explanation: