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MatroZZZ [7]
3 years ago
5

Find the value of x. A. 10 B. 15 C. 20 D. 25

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
6 0

Answer:

(5x+13)+(3x+7)=180°

5x+3x=180°-7°-13°

8x=160°

x=160/8

x=20°

option C is correct

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What is the approximate area of a sector given O= 56 degrees with a diameter of 12m?​
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<em><u>Solution:</u></em>

Given that we have to find the approximate area of a sector given O= 56 degrees with a diameter of 12m

Diameter = 12 m

Radius = Diameter / 2 = 6 m

An angle of  56 degrees is the fraction \frac{56}{360} of the whole rotation

A sector of a circle with a sector angle of 56 degrees is therefore also the fraction \frac{56}{360} of the circle

The area of the sector will therefore also be  \frac{56}{360} of the area

\text{ sector area } = \frac{56}{360} \times \pi r^2\\\\\text{ sector area } = \frac{56}{360} \times 3.14 \times 6^2\\\\\text{ sector area } = 17.584

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zalisa [80]

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The given expression is 3.4 -2.8d + 2.8d -1.3

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Like terms are the terms having the same variable and the same exponents.

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