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14.12.2020 •
Mathematics
Sabina is baking cookies for a bake sale, but she wants to keep some for her friends to eat. Let x represent the number of cookies to be sold at the bake sale and let y represent the number of cookies to be shared with friends. Sabina wants to sell at least ten more than twice as many cookies as she shares with friends. Sabina plans to make at most 120 cookies and wants to share between 10 and 20 of them with friends. Write the system of inequalities that represents these constraints.
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Ответ:
Step-by-step explanation:
the 2nd line can be rewritten as y < x-3
So, any value that is less than both 4x+4 and x-3 will work
Pick any value you want for x, and figure y possibilities
x=0; x-3=-3, 4x+4=4, so y<-3 ... (0,-5) will work
I'm sure you can now come up with other pairs.