5+14+12 = 31
38-31= 7
7 students play neither the flute or piano
7/38= 18.42%
Since anything within absolute value signs is ≥0, we know that the minimum value, when x=-2, is 7
So the vertex is the point (-2, 7)
<em>Because OP only asked for a clarification of the problem statement: </em>
You are asked to find the green area. (Hint: divide the green area into rectangles and right triangles, because you know their area.)
7 1/5 = 7 + 1/5
= 7/1 + 1/5
= (7/1 * 5/5) + 1/5
= 35/5 + 1/5
= 36/5
= 36 ÷ 5
= 7.2
