the manufacturing cost of a cell phone was $124 sellers first marked up the cost by 20% sales or force or seller's decrease the mark of the 15% calculate the old and new selling prices​

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

answer: x=3 and y=4

step-by-step explanation: