Respuesta :
Answer:
a. The system of linear inequalities is [tex]x + y \geq 3[/tex] and [tex]4x + 3y \leq 21[/tex].
b. The solution is given in the figure.
c. The given scenario can happen.
Step-by-step explanation:
Let, I will buy x pounds Blueberries and y pounds Strawberries.
I need to collect at least 3 pounds of fruits.
Hence, [tex]x + y \geq 3[/tex].
It also given that I can not spend more than $21, that is [tex]4x + 3y \leq 21[/tex].
If I will buy 4 pound Blueberries and 1 pound Strawberry, then x = 4 and y = 1.
Now, 4 + 1 = 5 > 3. First inequality is satisfied.
[tex]4x + 3y = 4\times4 + 3\times1 = 16 + 3 = 19 \leq 21[/tex], Second inequality is also satisfied.

4 pounds of blueberries and 1 pound of strawberries can be bought.
Let x represent the amount of blueberries in pound, y represent the amount of strawberries in pound.
Since at least 3 pounds of fruit to make muffins. hence:
x + y ≥ 3 (1)
Also, at most $21 can be spent on fruit, hence:
4x + 3y ≤ 21 (2)
Plotting both equations using geogebra. The graph is attached.
From the graph we can see that the point A(4, 1) satisfy the inequality, hence 4 pounds of blueberries and 1 pound of strawberries can be bought.
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