1)which of these systems of linear equations has an infinite number of solutions? a)3x-8y=21 6x-16y=46 b)3x+6y=22 6x+12y=44 c)5x+7y=24 10x-14y=48 d)5x-9y=20 10x+18y=40 2)consider the system of linear equations? 5x+10y=15 10x+3y=13 to use the linear combination method and addition to eliminate the x-terms, by which number should the first equation be multiplied a)-2 b)-1/2 c)1/2 d)2

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.

this is answer of 144 cubic meters