It'd be AEC, the vertex are just the lines that create the point E
It's should be 5 cause I don't know
Chocolate thickshakes will cost $5 and fruit smoothies will cost $3. Let's say the cost of chocolate thickshakes are x and the cost of fruit smoothies are y.
3x + 4y = 27
3x + 3y = 24
D I believe hope this helped