Answer:
cups of flour
Step-by-step explanation:
A muffin recipe, which yields 12 muffins, calls for 2/3 cup of milk for every 1 3/4 cups of flour.
Then this recipe, which yields one muffin, calls for

cup of milk for every

cups of flour.
Thus,
this recipe, which yields a batch of 30 muffins, calls for

cups of milk for every

cups of flour.
5x + 3 = 38
5x = 38 + 3
5x = 35
x = 35/5
x = 7
The area of the triangle is 49 in2, so she can create only 2 triangles.