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Vitek1552 [10]
3 years ago
12

What is the area of the triangle? 10 26 units 2 Help please

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
7 0

Answer:

130

Step-by-step explanation:

area of a triangle is (1÷2) × base × height

so we will have (1÷2 ) × 10 × 26

area is 130

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Margot is sewing a ribbon on a seam along the perimeter of a square pillow. The side length of the pillow is 2x2 1 inches. She p
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The expression used for the length of ribbon that she needs for both pillows will be 4(2x^{2} +4x-6).

The total length of the pillow she needs will be  130 inches.

Given,

The side length of pillow is (2x^2 + 1) \ inches.

The side length of another pillow is 4x-7 \ inches.

We know that perimeter of square will be,

P=4\times length

So the perimeter of pillow will be,

P=4\times (2x^2+1)\\

P=8x^{2} +4

Similarly, the perimeter of another pillow will be,

P=4\times (4x-7)]

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Hence,the total length of ribbon that she needs for both the pillows will be,

8x^{2} +4+16x-28\\8x^{2} +16x-24\\4(2x^{2} +4x-6)

If x=3.5\\ then the total length of ribbon will be,

4(2\times 3.5^{2}+4\times 3.5-6)\\4(2\times 12.25+14-6)\\

4(24.5+8)

4\times 32.5\\

130 \ inches.

Thus the required expression will be 4(2x^{2} +4x-6) and the total length of ribbon she needs will be 130 inches.

So, the correct option will be (D).

For more details on perimeter of square follow the link:

brainly.com/question/5402168

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The base of a right pyramid is a square with sides of 10". The slant height is 13" long. Find the total surface area of the pyra
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