-|It takes 10 minutes to walk across the bridge. If a dad has 4 kids and has to take them across the bridge one at a time, how much total time will the dad spend walking on the bridge?​

70 minutes.

Step-by-step explanation:

You would say 40, but think, he has to walk back and get the other kid by himself. Double it. Then subtract ten minutes bc hes not walking back for another kid.

(4,5

look up a corrdinate plane and do what the thingy says and boom

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.