Answer: Julieta must buy at least 2 mangos when she buys 9 bananas. Therefore, the possible values for the number of mangos she could buy are 2 or any whole number greater than 2, depending on her budget and preferences.
Explanation: Using the information given to find the possible values for the number of mangos that Julieta can buy when she decides to buy 9 bananas. First, we know that Julieta has $9.80 to spend. She spends $0.40 on each banana and $1 on each mango. So, let's set up an equation to represent the cost of buying 9 bananas and some number of mangos (let's call it 'm'):
Cost = (Number of Bananas * Cost per Banana) + (Number of Mangos * Cost per Mango)
Cost = (9 * $0.40) + (m * $1)
Cost = $3.60 + $m
Now, we need to ensure that Julieta spends no more than her $9.80 budget, and she must buy no less than 11 bananas and mangos combined. So we have two conditions:
1. Cost ≤ $9.80
2. Number of Bananas (9) + Number of Mangos (m) ≥ 11
Now let's consider the budget constraint:
Cost ≤ $9.80
$3.60 + $m ≤ $9.80
Subtract $3.60 from both sides of the inequality:
$m ≤ $9.80 - $3.60
$m ≤ $6.20
So, Julieta can spend up to $6.20 on mangos when she buys 9 bananas.
Now, consider the constraint on the total number of items:
Number of Bananas (9) + Number of Mangos (m) ≥ 11
9 + m ≥ 11
Subtract 9 from both sides of the inequality:
m ≥ 11 - 9
m ≥ 2
So again Julieta must buy at least 2 mangos when she buys 9 bananas. Therefore, the possible values for the number of mangos she could buy are 2 or any whole number greater than 2, depending on her budget and preferences.