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Svetllana [295]
3 years ago
6

Which relation is a function?

Mathematics
2 answers:
VikaD [51]3 years ago
4 0
The second one, functions cannot have multiple y values for one x value
nignag [31]3 years ago
4 0

A function is a relation which associates every element in the domain to a unique element in the codomain.

In option 1,

2 has more than one image, namely 3 and 7.

In option 3,

11 has more than one image, namely 9 and 5.

In option 4,

3 has more than one image, namely 8 and -2.

Hence, the correct option is 2, where every element in the domain has unique image.

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121 1/4

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Ludmilka [50]

Answer:

123.5 square inches

Step-by-step explanation:

Given: To find the area of a rectangle, you have to multiply base times height.

To find the area of a triangle, you have to do base times height devided by 2.

Finding the area: Let's break up this shape into polygons. At the bottom there is a rectangle. We know that to find the area of the rectangle you have to do base times height. 13in•7in will give you <u>91in</u> square for the rectangle.

Now for the triangle. If you can see, if you break the triangle in half, there are 2 right triangles. Let's look at the right one for now. Since we know that to find the area of a triangle you have to do base times height divided by 2,  you do 5in•6.5in=32.5in. 32.5in divided by 2 is <u>16.25in </u>square which is the area of one triangle. You might be wondering why i did 5•6.5, and that's because at the bottom of the rectangle you can see it's 13in, and 13in÷2=6.5in.

We already found the area of the rectangle and one triangle. The other triangle is equal to it so we can just do 16.25+16.25=<u>32.5in</u> square for both of the triangles.

Now we add it all up: 32.5+91=123.5 square inches

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