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Ne4ueva [31]
2 years ago
14

PLS HELPP Help Solve for x X =​

Mathematics
1 answer:
Basile [38]2 years ago
4 0

Answer:

x = 9

Step-by-step explanation:

The big triangle is similar to smaller one so we can use the side lengths' proportion to find x:

7/4 = (x-3)+8/8

7/4 = (x+5)/8 cross multiply expressions

56 = 4x + 20 subtract 20 from both sides

36 = 4x divide both sides by 4

9 = x

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) The density of oil in a circular oil slick on the surface of the ocean at a distance of r meters from the center of the slick
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Step-by-step explanation:

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=The area of the outer circle - The area of the inner circle

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=\pi [r^2+2r\triangle r+(\triangle r)^2-r^2]

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∴A=2\pi r\triangle r

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\sum_{i=1}^n \frac{80r_i\pi }{1+r^2}\triangle r_i=\int_0^5 \frac{80r\pi }{1+r^2}dr

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                      =40\pi [ln(1+5^2)-ln(1+0^2)]

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Therefore the mass of the of the oil is 409.59 kg.

3 0
3 years ago
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