How do I Express the inequality x < 7 using interval notation.

You can write this as (-infinity, 7) if you aren't able to use the infinity symbol.

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Explanation:

Think of x < 7 as writing

So x is between negative infinity and 7, excluding both endpoints.

To write in interval notation, we write

The curved parenthesis tell us to exclude the endpoint.

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.