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jeka57 [31]
3 years ago
5

I'll give points and brainalist for answer / explanation

Mathematics
1 answer:
Ber [7]3 years ago
6 0

Answer:

557.8

Step-by-step explanation:

Because the semi circle on the top and the semi circle on the bottom form a circle with an area of 314.16.

The semicirlces on either side form a circle with an area of 66.48.

Then the rectangle in the middle has an area of 9 times 20 which is 180.

If you add those areas together you get the total area which is about 557.8

I hope this is helpful :)

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The answer is below

Step-by-step explanation:

The table shows the ratio between the number of books ordered and their cost: Number of Books Cost (dollars) 7 21 8 24 9 27 Find equivalent ratios when the number of books ordered is 1, 2, and 3. Write them as ordered pairs in the form (x-coordinate, y-coordinate). Starting from the origin, explain how to plot the three equivalent ratios on a coordinate grid.

Answer: Let the number of books be represented as x and the cost (dollars) be represented as y. From the table the ordered pairs in the form (x, y) can be gotten. (7, 21), (8, 24), (9, 27). To get the relationship between the number of books and the cost, we can use the formula of a straight line.

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y-y_1=\frac{y_2-y_1}{x_2-x_1} (x-x_1)\\\\y-21=\frac{24-21}{8-7}(x-7)\\ \\y-21=3(x-7)\\\\y=3x-21+21\\\\y=3x

When the number of books ordered is 1, 2, 3 the following pairs are:

For x = 1.     y = 3x = 3(1) = 3

For x = 2     y=3x = 3(2) = 6

For x = 3     y = 3x = 3(3) = 9

The ordered pairs are (1, 3), (2, 6), (3, 9)

The graph is attached

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