4. The airplane rose 1600 ft. and then went down 400 ft. What is the present altitude of the airplane?

a. -1200 ft.
b. +1300 ft.
c. +1200 ft.
d. -1300 ft.

5. A submarine was situated 1940 meters below sea level. If it ascends 730 meters, what is
its new position?

a +1200 meters
b. +1210 meters
c. -1200 meters
d. -1210 meters​

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.

d

step-by-step explanation:

y=x+9

?

step-by-step explanation: