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Crank
3 years ago
7

Nine times the sum of a number and 2 is 189. I need to make it to an equation.

Mathematics
1 answer:
Olegator [25]3 years ago
3 0

<em>Equation:</em>

9(a+2)=189

<em>Solve the equation:</em>

9a+18=189

9a=189-18

9a=171

a=171/9

a=19

<em>Check the solution:</em>

Let a=19

9(a+2)=189

9(19+2)=189

171+18=189

189=189


Therefore, the equation is 9(a+2)=189 and a is 19.

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<h3>Is the length of a known arm in a 30 - 60 - 90 right triangle the long arm?</h3>

In accordance with geometry, the length of the <em>long</em> arm of a 30 - 60 - 90 <em>right</em> triangle is √3 / 2 times the length of the hypotenuse, the length of the <em>short</em> arm is 1 / 2 times the length of the hypotenuse and the length of the <em>long</em> arm is √3 times the length of the arm.

Thus, the measure of the angle between the hypotenuse and the <em>short</em> leg is 60° and we can conclude that the side with length 10 is not the <em>long</em> leg of the 30 - 60 - 90 <em>right</em> triangle. (Right choice: False)

To learn more on right triangles: brainly.com/question/6322314

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2 years ago
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Answer: your answer is D

Step-by-step explanation:

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swat32

Answer:

It will take 29 days to lay the track

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Step-by-step explanation:

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