A ski club rents cross-country skis. The table below shows the cost of rentals for two and four days. Number 1 2 3 of Days Rente
d Rental Cost ($) 12 17 22 27 Which explicit formula models the cost of renting skis from the club? o an . = 12 + 5n O an . 10n An = 5 + 5n O an an = 7+5n
Factor − 11 - 11 out of − 11 x - 11 x . 5 x 2 − 11 ( x ) + 6 5 x 2 - 11 ( x ) + 6 Rewrite − 11 - 11 as − 5 - 5 plus − 6 - 6 5 x 2 + ( − 5 − 6 ) x + 6 5 x 2 + ( - 5 - 6 ) x + 6 Apply the distributive property. 5 x 2 − 5 x − 6 x + 6
when a number is decreased by 19 %, u calculate backwards, making the % to 119% of 66. Hence it becomes 78.54 to be exact, but in the nearest tenth, it becomes 80.
