Question

THe cost of a hamburger is $2.50. Each additional hamburger cost $2.00. Sully wrote this explicit rule to explain the sequence of costs: f(n) = 2 + 2.5(n-1). Using the rule, he found the cost of 12 hamburgers to be 29.50. Is this number correct?

Answer 1

Answer:

Yes, the number is correct.

Step-by-step explanation:

The cost of a hamburger is $2.50.

Each additional hamburger cost $2.00.

Sully wrote this explicit rule to explain the sequence of costs:

$f(n) = 2+2.5(n-1)$

Using the rule, he found the cost of 12 hamburgers to be 29.50.

Lets check by putting n = 12.

$f(12) = 2+2.5(12-1)$

= $2+2.5(11)$

=  $2+27.5$

= $29.50

So, yes Sully is correct.

Answer 2

yes, it is correct

you just plug in the 12 where the n is