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Rob is crocheting scarves for a craft fair. He will give away the first 2 scarves and will sell the rest for 
$8 each. His scarves are very popular and people always buy all that he is willing to sell. Rob's goal is to earn at least 
$75. If 
n represents the number of scarves which Rob needs to crochet to meet his goal, which of the following inequalities best models the situation described above?
Choose 1 answer:
(A) 
8n-2 >= 75
(B) 
8n >= 75-2
(c) 
8(n-2) >= 75
(D) 
(8-2)n >= 75

Rob is crocheting scarves for a craft fair. He will give away the first 22 scarves and will sell the rest for $8 \$ 8 each. His scarves are very popular and people always buy all that he is willing to sell. Rob's goal is to earn at least $75 \$ 75 . If n n represents the number of scarves which Rob needs to crochet to meet his goal, which of the following inequalities best models the situation described above?\newlineChoose 11 answer:\newline(A) 8n275 8 n-2 \geq 75 \newline(B) 8n752 8 n \geq 75-2 \newline(C) 8(n2)75 8(n-2) \geq 75 \newline(D) (82)n75 (8-2) n \geq 75

Full solution

Q. Rob is crocheting scarves for a craft fair. He will give away the first 22 scarves and will sell the rest for $8 \$ 8 each. His scarves are very popular and people always buy all that he is willing to sell. Rob's goal is to earn at least $75 \$ 75 . If n n represents the number of scarves which Rob needs to crochet to meet his goal, which of the following inequalities best models the situation described above?\newlineChoose 11 answer:\newline(A) 8n275 8 n-2 \geq 75 \newline(B) 8n752 8 n \geq 75-2 \newline(C) 8(n2)75 8(n-2) \geq 75 \newline(D) (82)n75 (8-2) n \geq 75
  1. Initial Free Scarves: Rob gives away the first 22 scarves for free, so they do not contribute to his earnings. The scarves he sells are $8\$8 each. If nn represents the total number of scarves Rob crochets, then he will sell (n2)(n - 2) scarves because the first 22 are free. The total earnings from selling (n2)(n - 2) scarves at $8\$8 each would be 8(n2)8(n - 2). Rob wants to earn at least $75\$75, so the inequality should reflect that the earnings from the scarves sold should be greater than or equal to $75\$75. The inequality that models this situation is $8\$800.

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