Answer:
$53.50. Hope this helps ;) don't forget to rate this answer !
Explanation:
The cost of a two-line ad is $25.50.
The cost of each additional line is $7.
The number of additional lines in a six-line ad is 6 - 2 = 4.
The total cost of a six-line ad is the cost of a two-line ad plus the cost of the additional lines:
total cost = $25.50 + 4 * $7 = $25.50 + $28 = $53.50
So a six-line ad costs $53.50.